Two small genetic changes reshaped the human pelvis, setting our early ancestors on the path to upright walking, scientists say.

One animal's predator is often animal's prey, but not with these species. Many of them are too tough to be taken down, though some have stranger tactics.

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The Tennessee River, one of the most important waterways in the South, sustains hundreds of species in the water, air, and ...

Cats are notorious for hiding when they are in pain and not feeling well. And like all animals, they face health challenges, ...