The tiny Amargosa vole doesn't live anywhere else on Earth, and a 2015 forecast said it had an 82 percent chance of extinction within five years.
The endangered dolphin is known for its expressive face and association with fishing boats, but it faces many threats.
New research suggests that if crocodiles had not changed their meal preference, they may have gone extinct.
Scientists confirm the wolf population that roamed Norway and Sweden for around 12,000 years was wiped out by humans.
Only two northern white rhinos are alive today. One was just retired from a breeding program designed to save the species from extinction.
The ivory-billed woodpecker was perhaps the best-known of the species that the U.S. Fish and Wildlife Service declared extinct.
With its disappearance, "we sort of lost a piece of the biodiversity puzzle that made up the tapestry of the San Francisco Bay area," a study co-author said.
"You work your whole life in the ocean for a moment like this...It was the last thing I expected to see come up after an hour fight," Captain Richard Pollitzer remarked.
An extinct dwarf emu egg was discovered on King Island. It is the first and most complete fossil of its kind.
One of six African Painted Dogs being raised by an Australian zoo has gone viral for its adorable vet check-up video.
A long-thought-extinct giant river otter was discovered swimming happily in the rivers of Argentina earlier this month.
A "four-legged fossil fish" predating dinosaurs has been recently rediscovered by groups hunting sharks with deep-sea nets.
This is the third highly dangerous sea snake discovered in recent weeks on the seabed in plain sight, but no anti-venom exists to combat them.
Scientists were stunned to find a species of sea snake that hadn't been seen in 23 years curled up on the seabed in plain sight.
The eruption may have wiped out the ozone layer.
"You haven't lived until you've put your arms around a mammoth femur trying to measure it," Smith said.
A fossil skull was 20 percent bigger than even those of the largest modern lions in Africa.
Surveying four small Russian islands near the shores of Alaska, scientists spotted a grizzly "fence" of bones on the beach that turned up a rare discovery.
Swift parrots are on the brink of extinction, and conservationists are getting desperate.