There's one obvious reason why it's easier for a species to survive a gradual environmental change than a sudden one: more individuals stay alive when change is gradual or moderate, meaning there are more chances for a winning mutation to emerge.
Almost one in five of the world's reptile species is threatened with extinction, a report from the Zoological Society of London (ZSL) warns.
Scientists say they're homing in on the precise date of both the extinction of the dinosaurs 66 million years ago, and the massive impact that's believed by many to have caused it.
It really is all our fault: the Tasmanian Tiger, or thylacine, was wiped out entirely by human actions; disease didn't play a part, as was previously thought.
The western long-beaked echidna, believed to have become extinct in Australia thousands of years ago, may still be alive and kicking in parts of the country today.
The news that the sabre-tooth cat became extinct despite the fact that it was ‘well-fed’ deepens the mystery of why they disappeared from America 12,000 years ago.
A proposed new center at Cambridge University will examine technologies, from biotechnology to artificial intelligence, that could perhaps threaten the future of our species.
The mass extinction that saw the end of the dinosaurs was made worse than it might have been by the structure of the ecosystems of the time.
Extreme temperatures meant it took five million years for the Earth to recover from the greatest mass extinction of all time.
Twenty-five species of primate are now close to extinction, according to a report released at the UN’s Convention on Biological Diversity.
The mass extinction that took out the dinosaurs was already well underway by the time a six-mile asteroid slammed into Mexico's Yucatán Peninsula 65 million years ago, it appears.
The Earth's greatest mass extinction, 250 million years ago, was so severe that it took 10 million years for the planet to recover.
Many dinosaur species were already on their way out before the asteroid strike that's believed to have led to their mass extinction.
The long-ago extinctions of some of the world's largest animals were caused by both human activity and natural climate change, according to new research from the University of Cambridge.
We may be being grossly complacent about the scale of species extinctions caused by climate change, according to US scientists.
Short gamma ray bursts could be more damaging to life on Earth than longer ones, says a Washburn University astrophysicist who's been studying data from the SWIFT satellite.
The asteroid widely believed to be responsible for the demise of the dinosaurs probably couldn't have been, observations from NASA's Wide-field Infrared Survey Explorer (WISE) telescope show.
Worms conceived via sexual reproduction are apparently endowed with a bolstered immune system that helps the creatures fight off deadly parasites.
High levels of greenhouse gases could kill off life in the oceans in the same way as happened during prehistoric times, geologists warn.
Religion's on its way out in every one of nine countries studied by a team of scientists.