NASA’s Dawn spacecraft captures detailed images of a giant asteroid’s alien landscape.

A distinctive croak heralded a new species of frog in New York.

Drought stressed the groundwater stores of the southern United States in 2011 and 2012.

Infrared data from two telescopes combine to expose rapid growth of infant stars.

A keen sense of smell may have given humans an edge in brain development.

Fire ants play a care-giving role for butterfly larvae.

NASA's airborne observatory captures stellar views unmatched by ground telescopes.