A previously unknown extinct tortoise was revealed in an investigation on these giants' evolutionary history.
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A female Tasmanian tiger that died in 1936, not a male named Benjamin, was actually the last surviving member of this extinct species. The female's remains had been hidden in museum storage.
About 90% of all species went extinct during the "Great Dying" around 252 million years ago, but in the case of one paleo-beast — the so-called gorgon — reports of its death were greatly exaggerated, new research finds.
The CIA is the latest investor in Colossal Biosciences, a company that wants to bring woolly mammoths and Tasmanian tigers back from extinction using DNA editing.
The dinosaur-killing Chicxulub impact triggered a months-long mega-earthquake that left its mark in the rock.
After the "Great Dying" at the end of the Permian period, life was slow to recover. The loss of a group of tiny marine organisms might explain why.
While surviving a mass extinction, strange tusked animals called lystrosaurs may have faced repeated drought, "mummy" fossils suggest.
Earth has experienced five mass extinction events over its 4.5 billion-year history. A sixth mass extinction is underway as a result of human-driven climate change.
An analysis of rocks exposed to the dinosaur-killing asteroid event reveals that the impact released more sulfur, which led to more global cooling than previously realized.
After an asteroid struck at the end of the Cretaceous period, debris from wildfires filled the atmosphere and blocked sunlight across Earth, causing ecosystem collapse and extinctions.
More than half of the species in five mammal groups went extinct in Africa about 34 million years ago, scientists recently discovered.
Scientists have discovered three new species of North American mammals, including one they've named after J.R.R. Tolkien's skin-changing warrior Beorn.
Scientists have uncovered an enormous fossil 'nursery' containing nearly 3,000 animal specimens from 518 million years ago, more than half of which are juveniles and babies.
Rediscovered footage of a thylacine taken in 1935 is the last-known recording of the marsupial, which went extinct in 1936.
Tens of thousands of years ago, a feces-contaminated wallow may have caused the deaths of nearly two dozen giant ground sloths.
The Chinese paddlefish, which could grow up to 23 feet long, may be the first official extinction of 2020.