The creation of three "dire wolf" pups has raised hopes that it may be possible to resurrect extinct animals. But some scientists have grave concerns.

Giant kangaroos stayed local, and rapid climate change gradually destroyed their lush rainforest home, leading to extinction.

Scientists revisited tracks made by a shorebird, a lizard, a cat-like predator and some sort of large herbivore at what is ...

This fossil is 13 million years older than any ant fossil found before—and reveals a sophisticated predator that lived alongside the dinosaurs.

Australia’s giant Protemnodon kangaroos didn’t die out everywhere at the same time. Instead, extinction proceeded one habitat ...

For the first time in over 150 years, the Philadelphia Zoo has new additions to the Western Santa Cruz Galapagos tortoise ...

As human beings have grown wealthier, they have come to care about environmental stewardship and gained the resources to act on their newfound compassion for wildlife.

Latnija cave discoveries show Mesolithic humans crossed 100 km of sea to reach Malta 1,000 years earlier than previously ...

There once used to be up to 10,000 grizzly bears roaming California, but they eventually disappeared from the state as humans ...

Some of the scientific groundwork that paved the way for a rebirth of the long-extinct dire wolf took place in Pennsylvania.

Utah researchers think they now know how existing crocodiles and alligators were able to survive the last two extinctions.

A new study found that it's possible to return grizzly bears to California. Whether that's a good idea is a matter for ...