Harvard scientists have found evidence to support long-standing anecdotes that stress turns hair gray.

A new study overturns long-held beliefs about the role humans played in shaping the landscape pre- and post- European colonization.

Colorado's National Eagle Repository is the only one of its kind in the world.

Sumatran tigers are critically endangered - with fewer than 400 believed to be left in the wild.

Harvard researchers have demonstrated the first material that can have both strongly correlated electron interactions and topological properties. The discovery both paves the way for more stable quantum computing and creates an entirely new platform to explore exotic physics.

The elm can be restored to its former glory despite Dutch elm disease, say experts.

Researchers find clues to evolution in the intricate mammalian vertebral column.

Critics call Sir David Attenborough's new nature series "breathtaking" and "visually magnificent".

Russian scientists tracking eagles got huge SMS bills when some birds flew to Iran and Pakistan.

The leashed beasts may look like large powerful dogs, but they still have the wild heart of a wolf.