Neil the Seal became a social media sensation almost overnight. Neil is a 5-year-old male southern elephant seal who weighs ...

Never before seen video shows the moments two orcas smash a sunfish into pieces. NBC News' Sam Brock talks to biologist and ...

Kent Carpenter, 73, who police said was killed by three men who entered his house, is said to have shaped global conservation ...

Why do men have an Adam's apple? A biologist explains the puberty hormone surge behind it, the sexual-selection theory and the debate over what it signals ...

Four people were injured after a multi-vehicle crash on the Eisenhower Expressway early Thursday morning.

The uvula is nearly unique to humans among mammals. An evolutionary biologist unpacks competing theories for why we evolved ...