An analysis of the sloth family tree suggests three different groups of the animals evolved to gigantic sizes in response to ...

Molecular clues from collagen in old bones are teaching us about the lives, movements, and demise of Ice Age megafauna like ...

They likely had little need to travel to find food. The extinction of Australia’s megafauna – long-vanished beasts such the “marsupial lion” Thylacoleo and the three-tonne Diprotodon – has long been ...

A new fossil and DNA analysis traces how dozens of sloth species responded to climate shifts and humans. Just two small tree-dwelling sloths remain today.

They likely had little need to travel to find food. The extinction of Australia's megafauna - long-vanished beasts such the "marsupial lion" Thylacoleo and the three-tonne Diprotodon - has long ...

Editor’s Note: Call to Earth is a CNN editorial series committed to reporting on the environmental challenges facing our planet, together with the solutions. Rolex’s Perpetual Planet ...

"The debate about the extinction of the Australian megafauna has been going on for decades, but now we can take it to an individual and species-by-species perspective," said Dosseto, from the ...

Neuroscientists have identified a brain signal in mice that kick-starts the process of overwriting fearful memories once danger is passed — a process known as fear extinction. The research is at ...

He has been a regular contributor to National Geographic since 1998, writing on such topics as dinosaurs, particle physics, earthquakes, extraterrestrial life, megafauna extinction and the ...

May 20, 2025 — A novel analysis suggests more than 3,500 animal species are threatened by climate change and also sheds light on huge gaps in fully understanding the risk to the animal ..

Using mathematical models, they found the real threshold to safely steer clear of extinction is quite a bit higher than previously thought. "The results indicate that the fertility rate should ...