Earth
The timeless tortoise: Secrets to longevity and survival
The tortoise’s slow walk is not just a quirky trait — it’s a life philosophy, ingrained in their very survival

When we think of slow and steady, the image of a tortoise often comes to mind. But behind that unhurried gait lies a remarkable creature capable of defying time itself. The tortoise is among the longest-living animals on the planet. Their extraordinary lifespan has fascinated biologists and storytellers alike, leading us to wonder: how do these creatures live so long? Is it the giant tortoises of the Galápagos or the smaller, land-dwelling species that hold the key to longevity? Let’s take a deeper look.
A Life of Patience and Persistence
The tortoise’s slow walk is not just a quirky trait — it’s a life philosophy, ingrained in their very survival. These creatures are not in a race against time, they are its patient conquerors. Some species of tortoises can live well over a century, and in the case of the Giant Tortoise (known for its immense size), individuals have been documented living for more than 200 years. But why is it that these ancient reptiles live so long, while their cousins, the turtles, tend to have shorter lifespans?
In terms of lifespan, tortoises—especially the giant tortoises—lead the pack. A giant tortoise can outlive many other creatures, including their ocean-dwelling cousins, the turtles. While turtles generally live between 50 to 100 years, giant tortoises surpass this, sometimes even living beyond 150 years. In fact, Jonathan, a Seychelles giant tortoise living on Saint Helena Island in the South Atlantic, holds the record as the world’s oldest living land animal at 189 years old. Jonathan, who was born in 1832, has outlived all of his peers, continuing to thrive on the island where he was discovered.
The Science Behind Their Longevity
The secret to the tortoise’s longevity lies deep within its biology. While there are several factors that contribute to their long lives, two of the most significant are evolutionary adaptations and cellular processes that are finely tuned to conserve energy and maintain health over decades.

From an evolutionary perspective, tortoises face fewer natural threats in their environment compared to faster, more vulnerable animals. For many species of tortoises, survival has been less about outpacing predators and more about outlasting them. Many tortoises lay multiple eggs, often many more than a single clutch, and they continue to reproduce over several decades. This “quality over quantity” approach to reproduction ensures that their genes continue to thrive, while their individual lifespans stretch out.
Moreover, tortoises tend to have slower metabolic rates compared to other animals. Their bodies conserve energy by keeping their metabolic processes at a steady, slow pace. This “slow burn” strategy is key to their extended lifespans. A slow metabolism means that fewer cellular processes are damaged by the wear and tear of daily life, which translates into fewer health issues in old age.
One of the most fascinating aspects of tortoise longevity is the role of their telomeres. Telomeres are the protective caps at the ends of chromosomes that prevent them from fraying and tangling. Every time a cell divides, the telomeres shorten slightly. In most organisms, as the telomeres shorten, cells lose their ability to divide, eventually leading to aging. However, in tortoises, the telomeres wear down at an unusually slow rate, allowing their cells to divide without the usual detrimental effects seen in other animals. This slower rate of telomere shortening helps them avoid age-related diseases such as cancer and ensures that their cells remain healthier for longer.
Furthermore, some studies have revealed that tortoises are capable of a process called apoptosis—a form of programmed cell death—where damaged or dysfunctional cells are destroyed before they can cause harm. This controlled form of self-destruction in damaged cells helps prevent the formation of tumors and other age-related diseases, which is another reason for the tortoise’s impressive lifespan.
The Giants of the Tortoise World
When we talk about longevity in tortoises, we cannot overlook the giant tortoises of the Galápagos Islands and the Seychelles. These remarkable creatures have not only captured our imagination but have also become living symbols of resilience and endurance.
The Galápagos Giant Tortoise, for instance, can live over 150 years, and some individuals have even outlived the scientists who studied them. They were once thought to be heading for extinction, but thanks to conservation efforts, their populations have stabilized.
In India, a rare breed of tortoise known as the Aldabra Giant Tortoise has been known to live up to 255 years. This species, although not as well-known as the Galápagos counterparts, is another testament to the wonders of nature’s design.
Turtles, which are often found in aquatic environments, tend to live shorter lives, averaging about 30 to 50 years
But what about other, lesser-known giants? In Kasaragod, Kerala, India, a giant soft-shell turtle species was discovered in May 2021, which lives in freshwater, weighing over 100 kilograms! These giant creatures are living proof of the astonishing adaptability and longevity that nature has to offer.
The Mystery of Tortoises and Turtles
While all tortoises are technically land-dwelling creatures, there is an interesting distinction between tortoises and turtles. Turtles, which are often found in aquatic environments, tend to live shorter lives, averaging about 30 to 50 years. Tortoises, on the other hand, tend to have larger bodies, longer necks, and more robust shells. Their heavy, often plant-based diet plays a role in the additional years they add to their lifespan.
A surprising discovery made in the Seychelles in recent years has sent shockwaves through the scientific community: certain tortoises, once thought to be herbivorous, have been seen eating birds and other small animals. This has raised questions about the adaptability of tortoises in changing environments and has piqued the interest of researchers studying their survival strategies.
What Lies Ahead?
Despite all that we know about these extraordinary creatures, there is still much to discover. Researchers continue to study tortoises, particularly the giant species, to learn how their unique biological traits could benefit human medicine, particularly in the fight against aging and diseases like cancer. The discovery of their telomere dynamics, coupled with the ability to prevent cell damage through apoptosis, could one day revolutionize the way we approach longevity and healthcare.
For now, we can only marvel at the tortoise’s timeless existence, its slow, steady journey through the ages, and the lessons it teaches us about patience, resilience, and the secrets of life’s most enduring creatures.
Earth
Spotted Deer Introduced in Gujarat’s Banni Grasslands, India to Aid Biodiversity Restoration
The translocation, conducted in collaboration with the wildlife conservation initiative Vantara, is part of an effort to enhance biodiversity in one of Asia’s largest and most fragile grassland ecosystems

In a move aimed at supporting ecological restoration in the Banni Grasslands, Gujarat, India, the State Forest Department has introduced 20 spotted deer into a protected 70-hectare area within the landscape. The translocation, conducted in collaboration with the wildlife conservation initiative Vantara, is part of an effort to enhance biodiversity in one of Asia’s largest and most fragile grassland ecosystems. Vantara is a wildlife conservation initiative founded by Anant Ambani, a board member of Reliance Industries, one of India’s largest conglomerates. Vantara operates the Greens Zoological, Rescue and Rehabilitation Centre in Jamnagar, which served as the source facility for the spotted deer.
The spotted deer, also known as chital (Axis axis), were translocated from Vantara’s ex-situ conservation facility in Jamnagar. They were moved in specially designed ambulances and released under the direct supervision of the Forest Department. Vantara provided logistical and veterinary support to ensure adherence to conservation protocols during the process.
The Banni Grasslands, stretching over 2,600 sq. km in Gujarat’s Kutch district, are a unique arid ecosystem that supports a range of wildlife. According to regional biodiversity surveys, 12 species of mammals have been recorded in the area, including six carnivores such as the Indian wolf and striped hyena, and two herbivores, including the Indian gazelle.
Forest officials and experts from Vantara jointly conducted a field assessment ahead of the deer release to evaluate habitat conditions and inform future rewilding strategies. The review included ecological suitability checks and outlined key habitat restoration measures.
Dr. Brij Kishor Gupta, Director of the Greens Zoological, Rescue and Rehabilitation Centre under Vantara, noted the importance of science-driven collaboration in the effort.
“This initiative reflects a collaborative approach to conservation, where scientific expertise and logistical support are combined to strengthen biodiversity in the Banni Grasslands. Contributing to government-led efforts, the focus remains on achieving meaningful conservation outcomes through partnerships grounded in shared objectives.”

The Gujarat Forest Department has been working to manage ecological pressures in Banni through habitat restoration, control of invasive species, and promotion of native grass growth—critical to sustaining herbivore populations and the carnivores that depend on them.
While the introduction of spotted deer is a notable milestone, experts emphasize that such rewilding interventions must be closely monitored. Ecologists point out that herbivore populations can influence vegetation dynamics, and the long-term impact on the grassland’s carrying capacity and predator-prey relationships remains to be studied.
For now, the project marks a rare instance of coordinated public-private conservation action in India’s grasslands—ecosystems often overshadowed by forests and wetlands in national conservation discourse. As such, it could serve as a model for future wildlife restoration efforts in similar landscapes.
Earth
How Barn Owls Brought Nature, Knowledge, and Heart to a South African Campus
At the University of the Free State, South Africa, a quiet conservation story unfolds above the bookshelves – reminding us that even academic spaces can grow wings.

High above the rows of books and hushed reading tables of the Sasol Library at the University of the Free State (UFS), something unexpected is taking flight. A pair of barn owls have made their home in the library’s roof, quietly raising their young and shifting the way an entire academic community sees its role in the world. Their story, both poetic and practical, is becoming a symbol of collaboration, compassion, and conservation.
The owls aren’t just guests—they’re catalysts. What began as a distressed bird outside the library in 2023 has transformed into a university-wide initiative blending science, storytelling, and shared stewardship.
“Our library is a living ecosystem”
For Prof Vasu Reddy, Deputy Vice-Chancellor: Research and Internationalisation, the owls are more than a charming anecdote.
“If we consider Shakespeare’s play, All’s Well That Ends Well, then the presence of the owls in the Sasol Library confirms another meaning of that play,”
“Love,” Prof Reddy says, “is not always considered noble, but is something persistent, and our library is not just a building, but a living ecosystem where precious documents, people, and even animals can interact, shape, and nurture our lives.”

That idea—that libraries are not only homes to knowledge, but habitats for life—is now echoed across campus.
A rescue that became a movement
The turning point came when Tanya Scherman, from the Centre for Teaching and Learning, spotted a sick owl near the library—likely a victim of secondary poisoning from a contaminated rodent.
“It appeared that the owl had been poisoned,” she recalls. “I phoned around trying to find more knowledgeable people who could help.”
Her outreach brought in a network of allies, including the Owl Rescue Centre in Pretoria, a local vet, and Prof Francois Deacon from the Department of Animal Sciences.
“As someone passionate about urban wildlife conservation, I saw a great opportunity – not just to support the owls, but to involve students in hands-on learning,” says Prof Deacon.
Together with his postgraduate students, Ruan Higgs and Kaitlyn Taylor, the team designed a custom nesting box and installed a motion-activated infrared camera to monitor owl activity safely. For Scherman, building the box was a family affair.
“I worked with my dad to build it,” she shares. “He’s an avid animal lover too… It was such a special moment to share with my family.”
From research to relationships
The project has already yielded tangible outcomes. In 2023, the owl pair successfully raised two owlets. This year, six eggs were laid—three owlets are visible so far.

“It captures feeding events, chick development, and parental behaviour,” says Prof Deacon. “This kind of passive monitoring is invaluable… These owls are teaching tools.”
Their footage has already formed the basis for student research on owl diet, nesting habits, and ecological adaptation. And the benefits go beyond science.
“What’s been most rewarding was how many people came together around this – from librarians to students to scientists. We built friendships, not just a nest box.”
Even librarian Hesma van Tonder joined a giraffe capture excursion with Deacon’s team. These moments, Deacon says, are where research and real-life adventure meet.
Symbols of wisdom – and survival
For Scherman, the owls touch something deeper than academic interest.
“My grandparents also had a special connection to owls… When we saw the baby owlets, I naturally felt like I was being promoted to an owl-granny!”
She also hopes to change cultural perceptions around these often-misunderstood birds.
“It’s understandable,” she says, “with their eerie calls, white faces, and ghost-like flight. But they are also messengers, protectors, and symbols of wisdom in many traditions.”
From reducing rodent populations naturally to serving as symbols of coexistence, barn owls bring both ecological and educational value.
“A single owl pair can eat hundreds of rodents in a breeding season,” says Prof Deacon. “We found remains of small birds and insects in their regurgitated pellets… which shows just how active and adaptive they are in an urban environment.”
But risks remain—road traffic, noise, and poisoning threaten their safety. That’s why Scherman and Deacon urge the campus community to be mindful.
“Don’t try to help an injured owl yourself,” says Scherman. “Rather contact Prof Deacon or me… We’re here to assist.”
“Awareness builds respect,” Prof Deacon adds. “Simple behaviours, such as keeping windows closed at night near the roost, go a long way.”
Where silence meets storytelling
As word spread, the initiative grew in meaning—turning the Sasol Library into more than a study space. It’s now a symbol of the university’s values in action.
“It is clear that what may be seen as a disruptive incident with an owl swooping into our library space is also a pedagogical and deeply conservation touchdown,” reflects Prof Reddy.
“Our barn owl event tells us that our library is also a space where silence meets storytelling… where every creature’s story has a rightful place.”
Looking forward
The team is already dreaming bigger. Deacon hopes to expand the project into green corridors, rooftop biodiversity zones, and support for species like bats and pollinators. He sees it as the start of a new kind of campus culture—one rooted in curiosity and care.
“If our university matters and is to remain meaningful,” Prof Reddy says, “our accidental visitors have given new impetus to the fact that our library space holds our stories, and they are making places for new ones as part of our responsible societal futures.”
As the owls continue their quiet vigil above the Sasol Library, they leave more than pellets behind. They leave a legacy of connection—between people, nature, and the pursuit of knowledge. And in that space, where a library became a nest, a new kind of learning has taken flight.
Earth
Meltwater ponds might have sheltered life during earth’s deep freeze
During this time, the planet was believed to be encased in ice, with global temperatures plummeting to as low as -50°C

In a study published in Nature Communications, scientists from MIT have proposed that shallow meltwater ponds may have provided critical refuges for early complex life during one of Earth’s most extreme ice ages — the “Snowball Earth” period, which occurred between 635 and 720 million years ago.
During this time, the planet was believed to be encased in ice, with global temperatures plummeting to as low as -50°C. Despite the harsh conditions, complex cellular life — known as eukaryotes — managed to survive. The new research suggests that these life forms could have found sanctuary in small, briny pools formed on the surface of equatorial ice sheets.
“Meltwater ponds are valid candidates for where early eukaryotes could have sheltered during these planet-wide glaciation events,” said lead author Fatima Husain, a graduate researcher in MIT’s Department of Earth, Atmospheric and Planetary Sciences, in a media statement. “This shows us that diversity is present and possible in these sorts of settings. It’s really a story of life’s resilience.”
The team drew parallels between ancient equatorial ice sheets and modern Antarctic conditions. They studied contemporary meltwater ponds on Antarctica’s McMurdo Ice Shelf — an area first dubbed “dirty ice” by explorers in the early 20th century. These ponds, formed by sun-warmed dark debris trapped within surface ice, provided a modern analog to the possible melt environments of the Cryogenian Period.
Samples taken from these Antarctic ponds revealed clear signatures of eukaryotic life. Using chemical and genetic analysis, including the identification of sterols and ribosomal RNA, the researchers detected algae, protists, and microscopic animals — all descendants of early eukaryotes. Each pond supported unique communities, with differences shaped largely by salinity levels.
“No two ponds were alike,” Husain noted. “There are repeating casts of characters, but they’re present in different abundances. We found diverse assemblages of eukaryotes from all the major groups in all the ponds studied.”
These findings suggest that meltwater ponds — overlooked in previous hypotheses — could have served as vital “above-ice oases” for survival and even diversification during Snowball Earth.
“There are many hypotheses for where life could have survived and sheltered during the Cryogenian, but we don’t have excellent analogs for all of them,” Husain explained. “Above-ice meltwater ponds occur on Earth today and are accessible, giving us the opportunity to really focus in on the eukaryotes which live in these environments.”
The study was co-authored by MIT’s Roger Summons, Thomas Evans (formerly MIT), Jasmin Millar of Cardiff University, Anne Jungblut of the Natural History Museum in London, and Ian Hawes of the University of Waikato in New Zealand.
By uncovering how life may have persisted through Earth’s frozen past, the research not only deepens understanding of our planet’s history — it may also help inform the search for life on icy worlds beyond Earth.
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