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Hiking with the wildlife author who studies Yosemite’s high peaks: ‘These animals are equal to us’

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Sunday, November 2, 2025

A shrill call was followed by a flash of movement through a pile of boulders on a high country slope in Yosemite national park. “Hello, Sophie!” Beth Pratt responded to the round, feisty pika who had briefly emerged to pose defiantly in the sun.Pratt, a conservation leader and wildlife advocate, has spent more than a decade observing the tiny mammals and the other inhabitants of these serene granite domes and the alpine meadows they overlook, which gleamed gold on a crisp afternoon in mid-October.Their stories are woven into Pratt’s new book, Yosemite Wildlife: The Wonder of Animal Life in California’s Sierra Nevada – the first in more than a century to focus solely on the more than 150 species who call the park home.Pratt’s book is designed to be more than a coffee-table tome. Each chapter features stories, facts and intimate insights about a different animal. The book isn’t necessarily meant to be read cover to cover. Rather, she was inspired by the encyclopedias she got lost in as a child.Paired with hundreds of photos from naturalist-photographer Robb Hirsch, as well as archival images, natural history and research, her storytelling transports readers into a world they don’t often have access to. Published by the Yosemite Conservancy, proceeds also directly benefit the park.Along with a glimpse into the lives of mammals, reptiles, amphibians and insects who dwell in one of the country’s most treasured parks, Pratt hopes to foster a deeper connection to the tenacious creatures who are surviving through the harshest conditions.“We think we as humans are so exceptional, but come up here and even the smallest of critters will put you in your place very quickly,” she said.Sophie the pika in Yosemite national park. Photograph: Gabrielle Canon/The GuardianThe world Pratt captures is fierce and fragile: Butterflies, weighing no more than a feather, fly over 12,000ft (3,650-meter) peaks. Freshwater crustaceans called fairy shrimp spring to life in small temporary ponds left after the mountain snow melts, their eggs able to last up to a century waiting in suspended animation for the right conditions. Pratt even saw a marmot chase off a coyote.But it also highlights how exceedingly vulnerable these animals have become. The climate crisis and the encroaching development into once-wild places have added challenges even for the most hardy.“People don’t understand that wildlife operate on the barest of margins,” Pratt said, pausing to ferry a caterpillar off the trail and onto the underbrush in the direction it was heading. “Something like trampling their nest or leaving trash out can result in dead animals or a loss of habitat or scaring an animal who doesn’t have a lot of energy reserves to begin with.”‘Stuff your eyes with wonder’For more than 30 years, Pratt has worked in environmental leadership roles, including heading the campaign behind the world’s largest wildlife crossing of its kind, stretching across 10 lanes of a bustling highway near Los Angeles.Her work helped the city fall in love with P-22, a celebrated urban mountain lion who lived in Griffith Park and died after being struck by a car in 2022, which inspired the P-22 Day festival – held in October this year – to honor and increase awareness around protecting wildlife. She is also the author of I Heart Wildlife and When Mountain Lions Are Neighbors.But from her first visit after she moved from Massachusetts to California in 1991 at the age of 22, “Yosemite claimed me”, she wrote in the book’s preface. Her adoration of national parks, first introduced in a book she dreamed over in middle school, was cemented during a first winter trip to the park that she now refers to as “her north star”.Beth Pratt and “pika hill,” in Yosemite National Park. Photograph: Gabrielle Canon/The GuardianFor 25 years, Pratt has made her home in the Sierra foothills just outside Yosemite, and she makes frequent trips through the park gates.With her new book, she’s invited the public deeper into a process 15 years in the making: Pratt said she’s about halfway through an attempt to record three decades of changes in Yosemite’s highest elevations.The hike up to an area Pratt affectionately refers to as “pika hill” is steep, but the rewards come quickly. “This is my happy place,” she said, gesturing toward a craggy ridgeline and the 13-mile (21km) route she’s looped countless times over the years to document how her friends are faring. The trail sweeps out from Yosemite’s eastern entrance on the Tioga Pass – a scenic thoroughfare that snakes through the Sierra at nearly 10,000ft – and offers access to the dramatic landscapes in a less-frequented part of the park.The high country is one of the places Pratt feels most at home and it inspired the intro to her book. “Stuff your eyes with wonder,” she quotes from the author Ray Bradbury, calling it a creed. Here, it is easy to do.In the distance, a lone coyote stalked through the amber plains in search of a snack. Overhead, a hawk, held fast by the wind, hovered in place. Sophie the pika retreated into tunnels burrowed deep under the rocks, as an azure lake on the horizon sparkled in the afternoon sun.Her process, though rooted in scientific observation, is simple: “I wander around and pay attention,” she said. Pratt’s patience has been rewarded again and again with rare encounters.She’s one of the few people who have seen burrowing owls here. She’s watched black bears sniff the air, and presided over the “commute of the newts”, an annual march of the small rust-colored amphibians as they descend down-canyon into their breeding-ground ponds near the Merced River.“When I was younger, it was such a push to see different places. Now I am really focused on one place,” she said. She knows the landscapes well – watching over them week to week through the seasons – and they have begun to know her in return. Sophie the pika wouldn’t have emerged for just anyone.“I treat them as people – because to me they are,” she said. “They are equal to us.”A gray fox captured by a camera trap on a rainy night with the moon rising. Photograph: Robb Hirsch/Yosemite ConservancyIt’s been her life mission to be a voice for those who have none, something she said was inspired by her love for wildlife and the late Jane Goodall. Goodall, who died earlier this year, was a primatologist and leader in her field who also named the animals she worked with – a practice once regarded as a coup against scientific convention.Goodall’s work inspired people around the world to take a greater interest in wildlife and in the negative impact humans have had, and Pratt’s work carries on that legacy.“Losing her couldn’t come at a worse time,” Pratt said. “All of us who do the work for the wildlife need to be louder now.”National parks facing threatsBefore heading back to the parking lot, Pratt called to Sophie one final time. They may not meet again. Soon, the pika would burrow deep beneath the snow, seeking protection from the cold by the drifts and the piles of vegetation she’d gathered to get her through.“You can see it’s the last hurrah – they can tell something is coming and they are out here preparing,” Pratt said, before turning back to the trail leading downhill. There was work left to do, both for Sophie and for Pratt.The effects of climate change have continued to unfold. Support for wildlife protections has eroded under the Trump administration, which has gutted budgets and pushed extractive policies. Yosemite and the national parks more broadly are facing greater threats; left without adequate staffing, there’s more pressure being put on landscapes and the animals who live within them.Beth Pratt. Photograph: Gabrielle Canon/The Guardian“Some days I am in despair,” she added. The setting sun offered a last brilliant glow as it slowly sank behind the purple horizon. “And then I think about the pika who have to gather enough hay for three months to live under the snow for the winter. Or these butterflies that are literally flowing over peaks with tattered wings. Or the Yosemite toad that has to walk sometimes up to a mile over snow to their breeding grounds.”With the first big snow foreshadowed in the darkening clouds gathering above, another winter was on its way. The hike was coming to an end, along with the season. But plans were already being made for the future. She’d soon be back.“If these animals can do this,” she said, “we got this.”

Inspired by childhood encyclopedias and Jane Goodall, Beth Pratt writes about the more than 150 species in the national park – and transports readers to a rarefied worldA shrill call was followed by a flash of movement through a pile of boulders on a high country slope in Yosemite national park. “Hello, Sophie!” Beth Pratt responded to the round, feisty pika who had briefly emerged to pose defiantly in the sun.Pratt, a conservation leader and wildlife advocate, has spent more than a decade observing the tiny mammals and the other inhabitants of these serene granite domes and the alpine meadows they overlook, which gleamed gold on a crisp afternoon in mid-October. Continue reading...

A shrill call was followed by a flash of movement through a pile of boulders on a high country slope in Yosemite national park. “Hello, Sophie!” Beth Pratt responded to the round, feisty pika who had briefly emerged to pose defiantly in the sun.

Pratt, a conservation leader and wildlife advocate, has spent more than a decade observing the tiny mammals and the other inhabitants of these serene granite domes and the alpine meadows they overlook, which gleamed gold on a crisp afternoon in mid-October.

Their stories are woven into Pratt’s new book, Yosemite Wildlife: The Wonder of Animal Life in California’s Sierra Nevada – the first in more than a century to focus solely on the more than 150 species who call the park home.

Pratt’s book is designed to be more than a coffee-table tome. Each chapter features stories, facts and intimate insights about a different animal. The book isn’t necessarily meant to be read cover to cover. Rather, she was inspired by the encyclopedias she got lost in as a child.

Paired with hundreds of photos from naturalist-photographer Robb Hirsch, as well as archival images, natural history and research, her storytelling transports readers into a world they don’t often have access to. Published by the Yosemite Conservancy, proceeds also directly benefit the park.

Along with a glimpse into the lives of mammals, reptiles, amphibians and insects who dwell in one of the country’s most treasured parks, Pratt hopes to foster a deeper connection to the tenacious creatures who are surviving through the harshest conditions.

“We think we as humans are so exceptional, but come up here and even the smallest of critters will put you in your place very quickly,” she said.

Sophie the pika in Yosemite national park. Photograph: Gabrielle Canon/The Guardian

The world Pratt captures is fierce and fragile: Butterflies, weighing no more than a feather, fly over 12,000ft (3,650-meter) peaks. Freshwater crustaceans called fairy shrimp spring to life in small temporary ponds left after the mountain snow melts, their eggs able to last up to a century waiting in suspended animation for the right conditions. Pratt even saw a marmot chase off a coyote.

But it also highlights how exceedingly vulnerable these animals have become. The climate crisis and the encroaching development into once-wild places have added challenges even for the most hardy.

People don’t understand that wildlife operate on the barest of margins,” Pratt said, pausing to ferry a caterpillar off the trail and onto the underbrush in the direction it was heading. “Something like trampling their nest or leaving trash out can result in dead animals or a loss of habitat or scaring an animal who doesn’t have a lot of energy reserves to begin with.”

‘Stuff your eyes with wonder’

For more than 30 years, Pratt has worked in environmental leadership roles, including heading the campaign behind the world’s largest wildlife crossing of its kind, stretching across 10 lanes of a bustling highway near Los Angeles.

Her work helped the city fall in love with P-22, a celebrated urban mountain lion who lived in Griffith Park and died after being struck by a car in 2022, which inspired the P-22 Day festival – held in October this year – to honor and increase awareness around protecting wildlife. She is also the author of I Heart Wildlife and When Mountain Lions Are Neighbors.

But from her first visit after she moved from Massachusetts to California in 1991 at the age of 22, “Yosemite claimed me”, she wrote in the book’s preface. Her adoration of national parks, first introduced in a book she dreamed over in middle school, was cemented during a first winter trip to the park that she now refers to as “her north star”.

Beth Pratt and “pika hill,” in Yosemite National Park. Photograph: Gabrielle Canon/The Guardian

For 25 years, Pratt has made her home in the Sierra foothills just outside Yosemite, and she makes frequent trips through the park gates.

With her new book, she’s invited the public deeper into a process 15 years in the making: Pratt said she’s about halfway through an attempt to record three decades of changes in Yosemite’s highest elevations.

The hike up to an area Pratt affectionately refers to as “pika hill” is steep, but the rewards come quickly. “This is my happy place,” she said, gesturing toward a craggy ridgeline and the 13-mile (21km) route she’s looped countless times over the years to document how her friends are faring. The trail sweeps out from Yosemite’s eastern entrance on the Tioga Pass – a scenic thoroughfare that snakes through the Sierra at nearly 10,000ft – and offers access to the dramatic landscapes in a less-frequented part of the park.

The high country is one of the places Pratt feels most at home and it inspired the intro to her book. “Stuff your eyes with wonder,” she quotes from the author Ray Bradbury, calling it a creed. Here, it is easy to do.

In the distance, a lone coyote stalked through the amber plains in search of a snack. Overhead, a hawk, held fast by the wind, hovered in place. Sophie the pika retreated into tunnels burrowed deep under the rocks, as an azure lake on the horizon sparkled in the afternoon sun.

Her process, though rooted in scientific observation, is simple: “I wander around and pay attention,” she said. Pratt’s patience has been rewarded again and again with rare encounters.

She’s one of the few people who have seen burrowing owls here. She’s watched black bears sniff the air, and presided over the “commute of the newts”, an annual march of the small rust-colored amphibians as they descend down-canyon into their breeding-ground ponds near the Merced River.

“When I was younger, it was such a push to see different places. Now I am really focused on one place,” she said. She knows the landscapes well – watching over them week to week through the seasons – and they have begun to know her in return. Sophie the pika wouldn’t have emerged for just anyone.

“I treat them as people – because to me they are,” she said. “They are equal to us.”

A gray fox captured by a camera trap on a rainy night with the moon rising. Photograph: Robb Hirsch/Yosemite Conservancy

It’s been her life mission to be a voice for those who have none, something she said was inspired by her love for wildlife and the late Jane Goodall. Goodall, who died earlier this year, was a primatologist and leader in her field who also named the animals she worked with – a practice once regarded as a coup against scientific convention.

Goodall’s work inspired people around the world to take a greater interest in wildlife and in the negative impact humans have had, and Pratt’s work carries on that legacy.

“Losing her couldn’t come at a worse time,” Pratt said. “All of us who do the work for the wildlife need to be louder now.”

National parks facing threats

Before heading back to the parking lot, Pratt called to Sophie one final time. They may not meet again. Soon, the pika would burrow deep beneath the snow, seeking protection from the cold by the drifts and the piles of vegetation she’d gathered to get her through.

“You can see it’s the last hurrah – they can tell something is coming and they are out here preparing,” Pratt said, before turning back to the trail leading downhill. There was work left to do, both for Sophie and for Pratt.

The effects of climate change have continued to unfold. Support for wildlife protections has eroded under the Trump administration, which has gutted budgets and pushed extractive policies. Yosemite and the national parks more broadly are facing greater threats; left without adequate staffing, there’s more pressure being put on landscapes and the animals who live within them.

Beth Pratt. Photograph: Gabrielle Canon/The Guardian

“Some days I am in despair,” she added. The setting sun offered a last brilliant glow as it slowly sank behind the purple horizon. “And then I think about the pika who have to gather enough hay for three months to live under the snow for the winter. Or these butterflies that are literally flowing over peaks with tattered wings. Or the Yosemite toad that has to walk sometimes up to a mile over snow to their breeding grounds.”

With the first big snow foreshadowed in the darkening clouds gathering above, another winter was on its way. The hike was coming to an end, along with the season. But plans were already being made for the future. She’d soon be back.

“If these animals can do this,” she said, “we got this.”

Read the full story here.
Photos courtesy of

Our bodies are ageing faster than ever. Can we hit the brakes?

All over the world people are ageing more rapidly and succumbing to diseases that typically affected the elderly. But there are ways to turn back the clock on your biological age

A decade or so ago, I had my biological age measured. I was in my mid 40s at the time and was fit, slim and a disciplined eater. When the results came back, I was gratified to discover that I was, biologically, quite a bit younger than my age. Around six years, if I remember correctly. I dread to think what it is now. In the intervening years, I have gained weight, stopped exercising as much, experienced multiple heatwaves and been through an extremely traumatic event, the suicide of my wife. I definitely feel all of my 55 years, and I wouldn’t be surprised if I’m biologically older. If so, I wouldn’t be alone. In the past few years, scientists have discovered a troubling trend in biological ageing. All over the world, people are getting older faster. Those born after 1965 are ageing, biologically, more rapidly than people born a decade earlier, and diseases that were once considered to be a scourge of the elderly are becoming ever-more common in younger people. People born before 1965 are ageing, biologically, more slowly than those born more recentlySTR/AFP via Getty Images “Cancers are increasing in younger age populations, people under 40 years of age have more heart attacks, more diabetes,” says Paulina Correa-Burrows, a social epidemiologist at the University of Chile in Santiago. “Why? My answer is because we’re ageing faster.” The reasons for this shift are starting to become clear. Some, unfortunately, are unavoidable. Many, thankfully, are modifiable. So, how can we endeavour to keep our biological and chronological ages in step? The best way to measure how rapidly somebody is ageing is by measuring their biological age and then doing so again a few months or even years later. The most accepted tool for this, says Antonello Lorenzini at the University of Bologna in Italy, is epigenetic clocks, tests that analyse modifications to DNA. These aren’t perfect – precise biological ages should be taken with a grain of salt – but they are enough for telling who, out of a group of participants, is ageing faster or slower. “ Some people are 10 years or more younger or older, biologically, than their actual age “ These tests recognise that chronological age – the number of years someone has lived – isn’t always a good indicator of how far along the ageing trajectory they are. In fact, it can be way off. For most people, there is a reasonably good correspondence, but some people are 10 years or more younger or older, biologically, than their actual age. And unlike chronological age, biological age can go down as well as up. The first suggestions that biological ageing is accelerating came from the world of obesity research. In 2016, a team led by Beatriz Gálvez at the National Centre for Cardiovascular Research in Madrid, Spain, noted that the biological effects of obesity overlap substantially with those of ageing. Both are hallmarked by dysfunction of the white adipose (fat) tissue, leading to metabolic conditions, widespread inflammation and damage to multiple organs, including the kidneys, bones and those of the cardiovascular system. Impacts of obesity These effects are usually directly attributed to obesity itself. But Gálvez wondered whether the causality is more indirect: obesity leads to premature ageing, which leads to the early onset of the diseases of old age. She and her colleagues coined the term “adipaging” to capture this relationship, and proposed that “to a great extent, obese adults are prematurely aged individuals”. A couple of years later, Lorenzini and his colleagues took the idea and ran with it. They started from an influential 2013 research paper called “The hallmarks of aging”, which describes nine molecular and cellular causes of age-related diseases. Lorenzini compared these with the consequences of obesity and found strong parallels. Both obesity and ageing lead to imbalanced nutrient sensing, altered intercellular communication, disturbances in protein metabolism, dysfunction of energy-producing mitochondria in cells, and cell senescence, when cells stop dividing but remain alive. “I think that fits very well with accelerating ageing,” says Lorenzini. “For many of the chronic diseases of our time, the major factor is ageing. So, of course, if you accelerate ageing, you will accelerate everything.” That includes death: the life expectancy of people over 40 with obesity is reduced, by about six years in men and seven in women. The biological clocks of people with obesity tick fasterALDOMURILLO/GETTY IMAGES Various attempts have also been made to measure whether the biological clocks of people with obesity really do tick faster. In 2017, for example, a team largely from the University of Tampere in Finland reanalysed archived blood samples from a group of 183 people taken 25 years apart: first during the teenage years or young adulthood, then again in middle age. The participants’ body mass index (BMI) was recorded when the samples were taken, so the researchers knew which of them had become obese. As expected, those who had gained a lot of weight had aged more biologically than they had aged chronologically, some by more than 10 years. Those who had remained lean had less of a mismatch. (The team also wanted to see what had happened to the rate of ageing in people who had lost weight, but there weren’t enough people in this category to do the analysis.) A similar study in women in their 20s, 30s and 40s also found that a higher BMI was associated with an older biological age, with each rise of 1 kilogram of weight per metre of height squared adding about 1.7 months. Another discovered that increased biological age was associated with various measures of obesity – BMI, waist-to-hip ratio and waist circumference – in women aged 35 to 75. Those with a BMI of 35 or more, putting them firmly in the obese category, were on average 3.15 years biologically older than women of the same chronological age who were a healthy weight. Cause and effect None of these studies, however, proved the direction of causality. It is possible that obesity accelerates biological ageing, but also that an increase in biological age somehow leads to obesity. Last year, researchers in Beijing teased these possibilities apart. They reanalysed data on tens of thousands of people who had been enrolled in a previous study and whose BMI, waist circumference and waist-to-hip ratio had been recorded on several occasions, along with five measures of their biological age. Applying a statistical method that can indicate the direction of causality, the researchers showed that obesity causes accelerated ageing compared with people of a healthy weight, to the tune of around three years. These studies all point in the same direction, says Lorenzini. “We are moving from hypothesis to data. The data is piling up.” The latest addition to this pile comes from the lab of Correa-Burrows and her colleagues at the University of Chile. They piggybacked on a research project called the Santiago Longitudinal Study, which started in 1992 and followed around 1000 people from birth up to their late 20s, originally to study the effects of nutrition on health in children and young adults. Correa-Burrows and her team recruited 205 participants who had made it all the way through the study. They were aged between 28 and 31 and comprised three groups: those who had maintained a healthy weight throughout life, those who had been obese since adolescence and those who had been obese since early childhood. There were already masses of data on these people, including their BMI throughout the study, but Correa-Burrows also used epigenetic clocks to measure their biological age. What she found was very clear. Those in the healthy weight group had, on average, biological ages slightly lower than their chronological age. But those in both obese groups were biologically older than their chronological age. This was by an average of 4.2 years in the obese-since-adolescence group and 4.7 in the obese-since-childhood group. A few had biological ages over 40. “We were expecting to find that, but we never expected the magnitude of difference that we saw in some individuals,” says Correa-Burrows. “Some of them had a 50 per cent gap between their biological age and the chronological age, which is huge.” It is now generally accepted in geroscience circles that obesity speeds up the ageing process, she says. Accelerated ageing is also attracting the attention of researchers outside the obesity field. Premature ageing is a well-known phenomenon among adult survivors of childhood cancer, who often become frail and die early as a result of the aftereffects of their illness and treatment. They are also at a higher-than-average risk of developing an unrelated cancer in later life. That may be because they are genetically predisposed to cancer, but this can’t fully explain the elevated risk. The cancer factor Last year, Paige Green at the US National Cancer Institute in Bethesda, Maryland, had a brainwave. Cancer is typically a disease of old age, and the survivors of childhood cancer were ageing prematurely. Maybe they were more vulnerable to cancer because they were biologically older than their chronological age. And not just that: accelerated ageing in the general population might also explain the rise in early-onset cancer, heart failure and strokes. “Cancer used to just be considered a disease of ageing,” says Jennifer Guida, an independent researcher who was formerly Green’s colleague. “Now people are being diagnosed with colon cancer in their 30s, breast cancer in their 30s. Why is that? Perhaps some of the processes of ageing are acting earlier and causing ageing to accelerate, which then causes early-onset cancer.” Green, Guida and their colleague Lisa Gallicchio wrote the idea up in the journal JAMA Oncology as a challenge to others to test it. “We put it out there as a hypothesis,” says Guida. “Maybe somebody will run with it and do the work to show that this is true, or disprove it.” The way to do it would be to measure the biological ages of a large number of people already enrolled in a large-scale study and tally that with early-onset cancers, she says. In fact, a team has already done that. Last year, Ruiyi Tian at Washington University in St. Louis, Missouri, told the American Association for Cancer Research’s annual meeting in San Diego, California, that she and her colleagues had analysed blood samples from nearly 150,000 people stored in the UK Biobank, looking for signs of accelerated ageing. The participants were aged between 37 and 54 when they had their blood taken. Measuring their biological age revealed that those on the younger end of the age spectrum, who had been born after 1965, were 17 per cent more likely to show signs of accelerated ageing than the older ones, born between 1950 and 1954. The researchers also found that accelerated ageing increased the risk of early-onset cancers of the lungs, gastrointestinal tract and uterus. “Accumulating evidence suggests that the younger generations may be ageing more swiftly than anticipated,” Tian told the association’s press office at the time. (The results haven’t been published in a peer-reviewed journal and Tian and her supervisor didn’t respond to requests for further information.) The “obesogenic” environment of many industrialised nations promotes ageing, but there is promise that weight-loss drugs can reverse thisDhiraj Singh/Bloomberg via Getty Images All in all, it seems we have created a world that not only promotes obesity – known as the obesogenic environment – but also ages us. Perhaps we need a new shorthand for it. I suggest the “senesogenic environment”, derived from the Latin verb senescere (“to grow old”). So, if younger people are ageing more rapidly, what is the cause? Obesity is the main one. “We have a huge obesity problem in places that have a Western-type diet,” says Guida. Obesity rates in 5 to 19-year-olds increased 1000 per cent between 1975 and 2022, according to the World Obesity Federation, and children with obesity tend to remain obese as adults. “Obesity’s prevalence has kept rising despite governmental efforts to try to reduce the rates, and by 2030, 1 billion people in the world will be obese,” says Correa-Burrows. What drives accelerated ageing? The mechanism by which obesity leads to accelerated ageing is a bone of contention. It may be that carrying around too much fat is a direct cause, possibly because it promotes long-term inflammation. “When you have chronic inflammation, it triggers these biochemical ageing signatures,” says Correa-Burrows. Alternatively, it could be that flooding the body with excess calories causes both obesity and ageing. Lorenzini favours this hypothesis, noting that many of the pathways associated with the ageing process are involved in nutrient sensing. It is well established that switching these pathways off in animal models – using drugs or caloric restriction – activates repair processes and retards ageing. Maybe people with a high-calorie, morning-noon-and-night diet chronically stimulate the pathways, so their body never has a chance to fix the damage that leads to ageing. Obesity isn’t the only culprit, however. “Anything that increases hormones related to stress, particularly cortisol, is going to have an adverse effect in terms of your biological ageing rate,” says Correa-Burrows. “Pollution has this effect. Early childhood adversity also. Trauma.” Exposure to heatwaves has also been found to speed up biological ageing (see “Heatwaves and premature ageing“), maybe because it activates stress hormones. People are also more sedentary than they used to be, says Guida. “All these things feed into each other to create this perfect storm.” Winding back the biological clock So how can you avoid becoming old before your time? “A lot of it comes down to lifestyle change,” says Guida. “Exercise is probably the biggest thing that you can do to slow your ageing. We know caloric restriction works too, but it’s not always feasible for everybody. Sleep is a great way to promote restoration and repair. And avoiding alcohol and smoking.” Avoiding obesity through healthy eating and exercise is key for slowing down biological ageingAlexander Spatari/Alexander Spatari Down the road, drugs might also help. The type 2 diabetes medicine Ozempic, a GLP-1 receptor agonist, was recently shown to slow the rate of ageing, and another study found that this drug family is also linked to a lower risk of obesity-related cancers. But we don’t yet know enough about the long-term effects to recommend them as an anti-ageing strategy, says Correa-Burrows. The good news, however, is that even if your biological clock has outpaced your chronological clock, lifestyle changes can throw it into reverse. “There are ways to synchronise both clocks or even put your biological clock below your chronological clock,” says Correa-Burrows. “Most of the interventions are based on changes in your lifestyle: exercising and changing your diet.” OK, I get it. Time to lose some weight and get active again. I doubt I can get back to being biologically six years younger than my age. Fifty-five would suit me just fine, though. Need a listening ear? UK Samaritans 116123; US 988 Suicide & Crisis Lifeline 988; hotlines in other countries Heatwaves and premature ageing Accelerated ageing isn’t just caused by obesity, stress and pollution (see main story). Climate change is also making us age faster. Earlier this year, Eun Young Choi and Jennifer Ailshire at the University of Southern California in Los Angeles analysed biological age data from 3686 adults aged 56-plus across the US, and cross-referenced it against climate records going back six years. They found that people who had been exposed to more hot days were ageing more rapidly, with each 10 per cent increase in exposure adding 1.4 months to their biological age. And in August, a team led by Cui Guo at the University of Hong Kong analysed data from nearly 25,000 adults in a medical screening programme in Taiwan. The researchers estimated the participants’ biological age and tallied their exposure to heatwaves – defined as periods of abnormally hot weather lasting for more than 48 hours – in the preceding two years. They found that people with a greater cumulative exposure to heatwaves were ageing faster than those with less exposure. Each four-day increase in total heatwave exposure was associated with a rise in biological age of about nine days. Totted up over a typical lifetime, this adds up to about five months. The mechanism by which heatwaves accelerate ageing isn’t clear, according to Paul Beggs, an environmental health scientist at Macquarie University in Sydney, Australia. But we know that acute heat exposure can damage the brain, heart and kidneys, and disrupt sleep.

Save This Species: The ‘Little Three-Horned Devil,’ One of Puerto Rico’s Rarest Plants

As the island faces continuous urbanization, this rare shrub has gone unnoticed and ignored for decades, shrinking into near-forgotten obscurity. The post Save This Species: The ‘Little Three-Horned Devil,’ One of Puerto Rico’s Rarest Plants appeared first on The Revelator.

Species name: Diablito de Tres Cuernos, Vahl’s boxwood (Buxus vahlii) IUCN Red List status: Endangered Description: Buxus vahlii is a short, slow-growing evergreen shrub or tree that reaches 3-10 feet (1–3 meters) in height, with ovular, dark-green, glossy leaves. It produces delicate, greenish-white flowers with small, rounded fruits growing close to the stem at the base of the leaves. Locally it’s called Diablito de Tres Cuernos (“Little Three-Horned Devil”) because of the distinctive shape of its fruits, which have three horn-like projections, giving this plant an eerie appearance when fruiting. Where they’re found: Buxus vahlii plants can be found in only a few highly restricted sites on the islands of Puerto Rico and St. Croix in the Caribbean Sea. They thrive in shallow, rocky limestone soils that few other plants can tolerate. Populations are found in small, forested patches surrounding areas that have long been developed or disturbed, often clinging to cliffs, ravines, and other rugged limestone terrain. It’s hard to say how many of these plants remain. Studies conducted between 2001 and 2018 documented up to seven remaining fragmented populations in Puerto Rico. There are four known populations on St. Croix, one of the U.S. Virgin Islands, including one within the Sandy Point National Wildlife Refuge and others on the hills south and east of Christiansted. Why they’re at risk: An immense amount of habitat destruction from urban development has placed Buxus vahlii at risk of total extinction. In Rincón, Puerto Rico, for example, the plants’ already restricted habitat and surrounding natural areas are threatened by the construction of a new highway that is unnecessary and opposed by the community. With no conservation attention, these populations continue to decline, unnoticed. On St. Croix, similarly, they’re threatened by urban development, invasive species, and human-caused wildfires. Who’s trying to save them: Buxus vahlii has been legally protected under the U.S. Endangered Species Act since 1985. The law requires the species to be reassessed every five years, but the assessments have not been carried out on that schedule — the first was in 2010, the next in 2018. Notably, they used outdated data, as the only recent field surveys have been conducted on St. Croix. The last field survey in Rincón was conducted in 2001. A new five-year review was initiated in 2023. Can we trust its findings without current data? Meanwhile development continues unabated. While federal agencies such as the EPA and the U.S. Army Corps of Engineers have regulatory authority to intervene, enforcement and active conservation measures have not been upheld. There are no active conservation programs protecting this plant’s populations in Puerto Rico. Why I advocate for this species: I’ve often ventured into the harsh limestone ridges of Rincón, Puerto Rico, where I’ve found myself alone in the one of the rarest of ecosystems. B. vahlii is one of the few species that thrives in the subtropical dry forest life zone, with its shallow, rocky limestone soil and exposure to coastal winds and salt spray. There, the plants are short and chlorotic due to these salty, windy conditions. Photo courtesy Marina E. De León, Ph.D. I’ve also enjoyed guiding community members through these terrains, where I share knowledge about the local flora while learning from their ancestral wisdom. During these times together searching for B. vahlii individuals, we’ve observed old, tall, red-orange Bursera trees that grow together with the native species of Ceiba. While hiking, it’s not uncommon to disturb big, beautiful black witch moths (Ascalapha odorata) that fly off in swaths when we walk by. It’s impossible to capture their true beauty with a camera; the best way to experience them is in the daytime. Navigating these steep hillsides is challenging and reminds me that there are sacred places in the world. The majority of plants we see are short Marias (Calophyllum antillanum). It’s not easy to spot a B. vahlii individual, so finding one is always exciting. You need to look at the leaves and notice the thickness, the glossiness, the shape of the leaf, and its little point at the tip. When I find one, I recognize that due to its rarity, I’m one of the few people on Earth who has ever been this close to one. B. vahlii is not necessarily an interesting plant. Its flowers are not large or fragrant, its leaves are plain and nondescript. It offers no direct economic or practical value to humans, yet its ecological and intrinsic worth are undeniable. Like all species, it has the right to exist, independent of human use or interest. Tragically, because it holds no perceived benefit to people, it has been overlooked, neglected, and steadily displaced by human activity. What else do we need to understand or do to protect this species? To protect B. vahlii effectively, conservation extends beyond the immediate boundaries where the plant is found. A buffer zone is an essential area surrounding the critical habitat that acts as a protective margin, shielding the core habitat from the harmful effects of nearby land use and development. Although B. vahlii itself may not grow within the buffer zone, this transitional space is crucial for maintaining the integrity of the habitat it depends on. It helps reduce the impact of external threats such as pollution, soil disturbance, altered hydrology, and the introduction of invasive species. The need to designate an official buffer zone is necessary due to edge effects, which occur where intact habitat meets the surrounding roads, construction sites, and cleared land. These edge zones experience increased fluctuations in light, temperature, and moisture, along with a higher risk of erosion and the spread of invasive plants or animals. For B. vahlii, which thrives under stable and specific conditions, such changes are probably detrimental, weakening the population’s ability to survive and reproduce. Fragmented habitats with high edge-to-interior ratios are vulnerable, and without an adequate buffer, the microclimatic and ecological conditions needed by B. vahlii degrade. We also need to conduct detailed surveys of the plant’s remaining fragmented habitats. This will allow land managers to understand where B. vahlii grows, as well as the quality and extent of the surrounding environment. Meanwhile ecological studies should examine the species’ interactions with pollinators, seed dispersers, soil microbes, and other components of its dry limestone forest habitats. Data from these surveys help determine the appropriate size and shape of a buffer zone, taking into account soil type, water flow, light exposure, and the presence of mutualistic species like pollinators or seed dispersers. The goal is to preserve not only the current populations, but also the ecological processes that support their long-term viability. Encroaching development poses a significant threat to both the critical habitat and the buffer zones of B. vahlii. Urban expansion can alter hydrology, compact soil, introduce chemical runoff, and facilitate the spread of aggressive non-native plants. Once such changes take place, they could be irreversible. Therefore, to ensure the survival of B. vahlii, development in and around its habitat, including within designated buffer zones, must be strictly limited or prevented altogether. Legal and regulatory protections should be created and enforced. Effective mitigation will require coordination with local and federal authorities to ensure that projects comply with environmental laws, and that buffer zones are respected and maintained. What you can do to help: Please email the following agencies and let them know that the public cares about this plant and we will not allow it to go extinct. U.S. Fish & Wildlife Service (Caribbean Ecological Services Field Office): Email: caribbean_es@fws.gov Puerto Rico Department of Natural and Environmental Resources (Departamento de Recursos Naturales y Ambientales, DRNA): Email: amartinez@drna.pr.gov Environmental Protection Agency (EPA) – Region 2 (Caribbean): Email: mears.mary@epa.gov Here’s a draft letter you can adapt or simply copy and paste to send to these agencies: Dear [Agency Name], I am writing to express serious concern over the status of Buxus vahlii (Diablito de Tres Cuernos), a federally listed endangered plant native to Puerto Rico and the Virgin Islands. This rare species depends on highly specific limestone and serpentine habitats that are rapidly dwindling due to ongoing development, including recent road construction in Rincón. Under both federal and Puerto Rican environmental laws, your agency is legally responsible for protecting this species and its critical habitat. Yet the most recent five-year assessment of B. vahlii reported outdated literature rather than current field data. Without updated surveys, it is impossible to evaluate the true condition of existing populations or the extent of their remaining habitat. I urge your agency to immediately conduct comprehensive field surveys to document the number of plants left and the size and condition of their habitat, and to ensure that all projects near known populations undergo full environmental review. The public is watching closely to ensure Buxus vahlii receives the protection it is legally owed. Safeguarding this species is not only a regulatory duty but also an ethical commitment to preserve Puerto Rico’s irreplaceable natural heritage. Thank you for your attention to this matter. I look forward to your response and to learning what actions your agency will take to ensure the survival of Buxus vahlii. Sincerely, [Your Name] [Locality] [Optional: Affiliation or organization] Previously in The Revelator: Save This Species: The Bettas of Bangka Island The post Save This Species: The ‘Little Three-Horned Devil,’ One of Puerto Rico’s Rarest Plants appeared first on The Revelator.

Rare white Iberian lynx captured on film in Spain by amateur photographer

Researchers to investigate whether environmental factors may have affected female animal’s pigmentationAn amateur photographer in southern Spain has captured unprecedented images of a white Iberian lynx, prompting researchers to investigate whether environmental factors could be at play as wildlife watchers revelled in the rare sighting.Ángel Hidalgo published the images on social media, describing the singular animal as the “white ghost of the Mediterranean forest”. Continue reading...

An amateur photographer in southern Spain has captured unprecedented images of a white Iberian lynx, prompting researchers to investigate whether environmental factors could be at play as wildlife watchers revelled in the rare sighting.Ángel Hidalgo published the images on social media, describing the singular animal as the “white ghost of the Mediterranean forest”.In a post, Hidalgo explained he had first caught a glimpse of the animal in a camera trap he had set up in a wooded area near the city of Jaén. The footage lasted just a few seconds, but it was enough to make out a lynx that appeared to have a white coat and dark spots, rather than the brown and black-spotted colouring usually associated with the species.“From then on, I started dedicating all of my free time to it,” Hidalgo wrote. “Time passed; hours, days, weeks and even months without success. Many times I was on the verge of giving up.”His lucky moment came as the sun rose after a rainy night. “When I saw a ‘white Iberian lynx’ for the first time, with its snow-white winter coat and piercing eyes, I was transfixed. I couldn’t believe what I was seeing,” he said.His images have made waves across Spain and beyond. Media described it as the first time a white lynx had been caught on camera.Those who work to protect the species, however, said the animal was known to researchers.Javier Salcedo, the coordinator of the EU-funded LIFE Lynx-Connect project, described her as a female named Satureja and said she had been born in 2021.The lynx had normal colouring at birth but her pigmentation had changed at some point. The change in colouring had seemingly not affected her behaviour, Salcedo said, as she continued to feed normally and had successfully raised several litters.“It’s neither albinism nor leucism,” he told the newspaper El País. Leucism refers to a partial loss of pigmentation in animals.“We’re investigating what might have happened,” Salcedo added. “We think it could be related to exposure to something environmental.”He said it was the second time researchers had come across a lynx with this characteristic; at one point scientists had tracked a female from the same area, possibly a relative of Satureja, watching as her colouring transformed to white and, later, back to brown.“That could imply the existence of some kind of hypersensitivity,” Salcedo said. “We detected this case because we conduct thorough monitoring of the lynx, but it can happen in other species without us noticing.”The regional government in Andalusía told the broadcaster TVE that the next step would be to briefly capture Satureja and take samples in the hope of gaining insight as to why her colour had changed.The rebounding presence of the Iberian lynx in Spain and Portugal has been hailed by the International Union for Conservation of Nature as a “great success story”.Less than a quarter of a century after the animal was feared to be on the brink of extinction, the populations have recovered to a point that the Iberian lynx was moved last year from “endangered” to “vulnerable” on the global red list of threatened species.

Galápagos had no native amphibians. Then it was invaded by hundreds of thousands of frogs

Scientists are only beginning to grasp the scale of the issue and understand what impact the tree frogs may have on the islands’ rare wildlifeOn the way to her office at the Charles Darwin research station, biologist Miriam San José crouches down near a shallow pond shrouded by vegetation and reaches deep into the foliage, pulling out a small green plastic box recorder.She left it there overnight to capture the infamous croaks of a Fowler’s snouted treefrog (Scinax quinquefasciatus), known to Galápagos scientists as an invasive threat, with repercussions researchers are only beginning to grasp. Continue reading...

On the way to her office at the Charles Darwin research station, biologist Miriam San José crouches down near a shallow pond shrouded by vegetation and reaches deep into the foliage, pulling out a small green plastic box recorder.She left it there overnight to capture the infamous croaks of a Fowler’s snouted treefrog (Scinax quinquefasciatus), known to Galápagos scientists as an invasive threat, with repercussions researchers are only beginning to grasp.Despite abounding with wildlife – centuries-old giant tortoises, swimming iguanas, and the finches that sparked Darwin’s theory of evolution – the Galápagos archipelago off the coast of Ecuador has long been free from amphibians. Until recently, no frogs, toads, newts, or salamanders waddled or hopped on its volcanic islands.In the late 1990s, that changed. Some small tree frogs made their way from mainland Ecuador to the islands, likely as stowaways on cargo ships.Fowler’s snouted tree frogs arrived in the 90s and have become established on Isabela and Santa Cruz islands. Photograph: Rashid Cruz/Charles Darwin Research StationGenetic studies suggest that, over the years, there have been repeated accidental introductions to the archipelago, and the frogs now have a strong foothold on two islands: Isabela and Santa Cruz. The population is growing so fast that scientists have been struggling to keep track, estimating numbers in the hundreds of thousands on each island, across urban and agricultural areas, but also in the protected Galápagos national park.When San José marked frogs and tried to recapture them in the following 10 days – a technique commonly used to make estimates of animal populations – she could find just one marked frog every once in a while, suggesting their populations were huge. They estimated 6,000 frogs in a single pond. “Our estimates are still very conservative,” says San José. “I am pretty sure there are even more.”The frogs’ abundance is clear from the acoustic chaos they cause. “The amount of frogs and the noise – it’s really insane,” says San José.For the scientists, their nightly mating calls are helpful in estimating their presence in far-flung areas, using recorders like the one outside San José’s office. But local farmers say the calls are so raucous they keep them up at night.“During the wet season, I constantly hear their calls and they’re really loud,” says Jadira Larrea Saltos, a coffee farmer at Finca La Envidia on Santa Cruz.“At first it was a surprise, seeing the first frogs in the area,” says Larrea Saltos, who started noticing their abundance about three years ago when one jumped on her hand as she was walking out of her front door. Now she has more poultry on her property, which she thinks has helped keep the populations relatively at bay.The noise isn’t the fundamental problem, though. While the species has been in the Galápagos for almost 30 years, scientists still know very little about its impact on the archipelago’s delicately balanced land and water ecosystems.Scientists are finding out more about the frogs, including that they can remain as tadpoles for as long as six months. Photograph: Joshua Vela Fonseca/Charles Darwin Research StationOn islands, it is very common for invasive species to thrive, as they have none of their natural predators. The Galápagos counts 1,645 invasive species, many of which are seriously disrupting the safety of its endemic ones. Avian vampire flies are bleeding rare bird hatchlings dry, and the hardy blackberry plant is encroaching on the Scalesia forests.A 2020 study suggests the invasive frogs are voracious insect eaters, and might be disproportionately consuming rare insects found only on the archipelago, or depleting the food sources of the islands’ rare birds, disrupting the food chain. Since the frogs’ diet is dominated by moths, they could even be affecting pollination on the islands, according to ecologist María del Mar Moretta-Urdiales, who was involved in the study.The Galápagos frogs have exhibited some unusual traits, including living in brackish water, which is uncommon for amphibians. Their metamorphosis process is also extremely variable, with some tadpoles turning into frogs very quickly and others taking a long time: San José observed one which remained as a tadpole in her lab for six months.“We really don’t know this part,” she says, worried the tadpoles could be affecting the islands’ freshwater, a very scarce resource in Galápagos. And even though studies show that the Galápagos diving beetle now eats large numbers of tadpoles in its diet, it doesn’t seem to be making a dent in their populations.More research is needed to determine the best way to control the frogs without harming other species. Photograph: Rashid Cruz/Charles Darwin Research StationMethods to curb the frogs in the early 2000s were largely unsuccessful. Park rangers tried capturing large numbers by hand and gradually increasing the salinity of lagoons in vain. Research suggests spraying coffee – which is highly toxic to frogs – or using electrocution could help, but these methods aren’t necessarily safe for other rare Galápagos species.Without answers to more of the basic questions about their biology and impact, culling the frogs might not even be the right way to go, says San José.While she hopes the growing use of environmental DNA techniques and genetic analysis will help her team make sense of the invader, funding for the project has been hard to come by. “Everybody wants to give funding for preserving frogs,” says San José. “But it’s harder to find funding for an introduced frog that you might want to control for.”Find more age of extinction coverage here, and follow the biodiversity reporters Phoebe Weston and Patrick Greenfield in the Guardian app for more nature coverage

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