It's the reptilian feel-good story of the year: A species of giant tortoise thought to be extinct for 150 years turns out to be alive and living on an even more remote island than the one from which ...

Tyrannosaurus rex (pictured in a 3D illustration of a fossil skeleton) had the strongest bite of any known land animal, extinct or alive. Credit: Shutterstock Scientists have announced the discovery ...

Social Security, Medicare are "going to be gone," Donald Trump warns Tropical Storm Melissa spaghetti models show chances of ...

If an animal hasn't been seen in the wild for more than fifty years, it's technically extinct. But academic criteria haven't stopped some disappeared species from reappearing, confounding official ...