Earth
What is the Science Behind the Boiling River
So what could be causing the river to boil?

When Andrés Ruzo, a native of Lima, Peru, was very young, his grandfather told him a captivating story—the story of the Spanish conquest of Peru. Atahualpa, the last ruler of the Inca Empire, was captured and executed by Francisco Pizarro and his Spanish soldiers. They became wealthy by plundering the gold and treasures of the Inca Empire. The tale became widely known in Spain, leading many Spaniards to venture to Peru, eager to claim gold and power. They asked the Incas where they could find more gold, and the Incas pointed toward the Amazon jungle, saying, “Go there, there’s as much gold as you need. There is even a city built of gold called Paititi.”
Spurred by these rumors, the Spaniards entered the Amazon in search of treasure. However, only a few of them returned from the jungle, and they came back with more than just tales of gold. They spoke of a tribe of mighty shamans, warriors armed with poisoned arrows, towering trees that blocked out the sun, eight-legged creatures that ate birds, snakes that devoured humans, and, most notably, a boiling river.
Andrés Ruzo grew up hearing these stories, and the image of the boiling river was etched in his mind. During his PhD studies, focused on geothermal energy potential in Peru, the thought of this river resurfaced. He wondered: Could such a river really exist? He posed the question to his colleagues, the government, and even to oil and gas companies. The unanimous answer was no. While warm rivers exist near volcanoes, there were no volcanoes in the Amazon—especially not in Peru. It seemed unlikely that a boiling river could exist there.
Ruzo once shared this viewpoint with his family during a dinner, but his aunt quickly interrupted. “No, Andrés,” she said, “there is such a river, I have been there.” Her husband agreed, confirming the story. That was when Ruzo’s relationship with the Boiling River truly began. From that moment, he set out to prove that the boiling river in the Amazon was not just a myth.
Ruzo ventured into the Amazon to find the river his grandfather and aunt had spoken of. This river is located in the heart of the Amazon rainforest in central Peru. As Ruzo described in an interview, as he approached the river, he heard what sounded like waves crashing on the shore. Soon, he began to see steam rising through the trees. The river, which he had first learned about through his grandfather’s stories, filled the air with steam. Upon testing the water temperature, Ruzo found it to be 86°C. The river’s temperature ranges from a minimum of 27°C to a maximum of 94°C. Many hot springs feed into the river, adding to the extreme heat. The river stretches for about 9 kilometers, with 6.24 kilometers of it flowing with boiling water. In the summer, the river is hot enough to kill anyone who falls into it. Small creatures, including frogs and snakes, are often found drowned in its waters.

The only people who live near this river are indigenous tribal communities, particularly the Shaman tribe, who consider the Boiling River sacred. To them, the river is a divine presence, an essential part of their daily life. They believe that Yakumama, the water goddess, transforms cold water into hot. In their language, yaku means water. The tribe uses the water from the river to drink, cook, make medicine, and even inhale the steam rising from its surface.
Locally, the river is known as Shanai Timpishka, which translates to “boiling by the heat of the sun.” But what is the scientific explanation behind the boiling waters of this river?
In 2011, Ruzo began his research on Shanai Timpishka, as little was known about the river outside of the local community. Even the people of Peru regarded the river as a legend rather than a natural phenomenon.
When Ruzo first encountered the river, he too was skeptical about its origin. Typically, rivers with such high temperatures are found near volcanic activity, but the nearest volcano to this river is over 700 kilometers away. So what could be causing the water to boil?
Another possibility was geothermal heat. But to explain the river’s boiling waters through geothermal energy, a massive heat source and a vast system of plumbing would be required to carry hot water to the surface.
With the support of the indigenous tribes living nearby, Ruzo set out to investigate what was truly happening at Shanai Timpishka. Each year, he returned to the Amazon to collect samples and measure the river’s temperature. As he recalls in his TED Talk, his fieldwork was filled with danger and adventure. On one occasion, after a heavy rain, he stood for hours on a small rock in the river, which was flowing at 80°C.

Over the course of several years, Ruzo conducted geophysical and geochemical experiments, ultimately reaching several conclusions.
The Boiling River is No Myth
Ruzo’s first major revelation to the world was that the Boiling River in the Amazon was not a mere myth. Despite not being near any volcanic activity, he began to explain the reasons behind the extreme temperatures in the river. The culprit, he concluded, was fault-fed hot springs. Just as blood flows through our veins, hot water travels through fissures in the Earth’s crust. When this hot water reaches the surface, geothermal phenomena like fumaroles (vents releasing gases and steam), hot springs, and boiling rivers like Shanai Timpishka occur.
Ruzo explains that a large hydrothermal system lies beneath the river. As water travels deep into the Earth, it gradually heats up. This is known as the geothermal gradient. The water, originating far below the Earth’s surface, flows through cracks or vents, eventually emerging as boiling water on the surface. The indigenous tribes in the area believe that the cold water from the river is transformed into hot water by the Earth’s heat—a phenomenon they regard as divine.
The river itself stretches across about 6.24 kilometers of boiling waters. It’s filled with large thermal pools, six-meter-high waterfalls, and other unique features. At certain points, the water reaches temperatures hot enough to rival your cup of coffee, and in some sections, the heat is even more intense.
What is Geothermal Heat?
The Earth’s interior consists of three layers: the crust, the mantle, and the core. The core is in a liquid state, and its temperature can reach up to 6,500°C. As water travels deeper into the Earth, it heats up, and as it nears the surface, this geothermal heat manifests itself in the form of fumaroles, hot springs, and rivers like Shanai Timpishka.
The process by which heat energy is released from the Earth’s core is known as geothermal energy. Geothermal energy is a renewable source of energy that is used worldwide for various purposes, including electricity generation.
Why the Boiling River Needs Protection
Although rivers near volcanoes may have hot water, a river with such high temperatures—away from volcanic influence—is exceptionally rare. However, the area around the Boiling River is facing significant threats. Large-scale deforestation is taking place in the region, and the river is also at risk due to industrial development.
While the heat source behind the Boiling River is an extraordinary geothermal phenomenon, more research and studies are still needed to fully understand it. Andrés Ruzo, in collaboration with local tribes, has initiated major efforts to protect the river. The Boiling River Project, based in the United States, is a non-profit initiative aimed at preserving this unique natural wonder. One of the key goals of the project is to declare the area around the river a Peruvian National Monument, ensuring its protection for future generations.
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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