When an animal moves from the endangered species list to being officially extinct, it's undeniably a sad day. The creature has gone the way of the dinosaur and the dodo, but on occasion, scientists ...
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 ...
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 ...