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 views unmatched by ground telescopes.
Recent finds add to a growing list of nearby Earth-like planets.
Beetle predators consider nutrition when choosing their prey.
Twin satellites investigate the lunar surface and structure.
In the worldwide wildlife trade, public health risks run high.
Scientists observe dolphins and whales at play in Hawaiian waters.