A skull belonging to what is thought to be an extinct species of giant polar bear has been discovered.
A new study has indicated that resurrecting long-extinct species could ultimately do more harm than good.
Biologists have warned that up to a half of all species could be wiped out by the end of the century.
Discovered in northwestern Montana, this ancient lizard lived in the desert around 75 million years ago.
A worrying new study has shown just how vulnerable many of the world's primate species actually are.
A new theory has suggested that the dinosaurs became extinct because they couldn't hatch quickly enough.
Teams from Russia and South Korea are working together to bring the extinct species back to life.
Conservationists have warned that the world's fastest land animal is on the verge of being wiped out.
The world's tallest animal has suffered a worrying decline in numbers over the last three decades.
Dr Fergus Simpson maintains that humanity has a 13% chance of going extinct before the century is out.
The specimen is the first near-complete dodo skeleton to go up for sale at auction in almost a century.
Scientists have revisited the classic Mary Shelley novel to find out what it teaches us about extinction.
If things don't change soon the ongoing decline is likely to reach two-thirds by the end of the decade.
Chinese conservationists believe that they have spotted an extinct dolphin species in the Yangtze river.
It's a sad day for conservationists as the last known Rabbs' tree frog has died in captivity in Atlanta.
Scientists in Australia have identified a tiny marsupial lion which went extinct 18 million years ago.
Mammoths could be granted a special protected status to stop their tusks being used as an ivory source.
A new study has suggested that the dinosaurs had already been dying out long before the asteroid hit.
Scientists have determined how deep-sea creatures survived the asteroid impact that killed the dinosaurs.
A new expedition is aiming to drill in to the crater left by the asteroid that wiped out the dinosaurs.