From river giants to land-dwelling beasts, these are the biggest creatures walking, swimming and flying across our planet ...

An animal represents each of the 50 states to celebrate the unique landscapes, histories and environments, and to promote the ...

Some creative calculations using bug traps, epidemiology and trees suggest there are some 20 million unique insect species on ...

Pangolins have armored bodies covered with overlapping scales that protect the mid-sized mammals that are native to parts of ...

It’s after the great extinction, with so many ecological niches now eerily empty, that birds start to diversify and specialize.

The ghostly white creature curled up on a weighing scale is almost unrecognisable in the Facebook post offering it for ...

While you might think a zoo is a zoo, these exhibits often have more than animals -- some of the world's oldest pack in quite ...

Earth's worst mass extinctions occurred when environmental change outpaced evolution, revealing a pattern spanning 450 ...

A tiny fox endemic to a single Mexican island vanished from scientific records over two decades ago, leaving researchers unsure whether it still existed at all. New photographs have shattered that ...

Pterosaurs, the first vertebrates to fly, would have had more diverse wing shapes than current scientific reconstructions ...

The vaquita is the rarest sea mammal on the planet. Fewer than a dozen of these shy little porpoises are left, and they live in just one place, the warm shallow waters at the top of the Gulf of ...

Science has spent decades trying to reconstruct Megalodon, the most powerful predator the oceans ever produced. The picture ...