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Space Travel

Since early 2004, the Mars rovers have gathered images of rocks and terrain where water, the presumed prerequisite of life, once flowed (an artist's rendition).

Life Beyond Earth

An ocean on Mars. An Earth-like planet light years away. The evidence is mounting, but are astronomers ready to say we’re not alone?

Dubbed the "human satellite," McCandless (bottom center, with the 1984 Challenger crew, including pilot-photographer Gibson, upper left) now works on space robots.

Footloose

The image of Bruce McCandless’ spacewalk two decades ago still amazes. It was the first untethered walk ever—and was among the last

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Sweet Sorrow

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Painted Ladies in Space

High schoolers ask: would metamorphosis aboard a space shuttle mission yield normal butterflies?

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