New, high-resolution images of the surface of Pluto beamed from NASA's New Horizons spacecraft reveal unparalleled geographical variety - from soaring mountains to sand dunes to frozen ice floes, scientists said Saturday.
Astronauts living at the International Space Station took their first bites of space-grown lettuce on Monday, in what scientists described as another step toward enabling human missions to Mars. The ability to cultivate food during a trip into deep space will be key to survival.
Flowing nitrogen ice glaciers have been glimpsed on the surface of Pluto, along with an unexpectedly thick layer of haze in the atmosphere, NASA scientists said Friday.
