NASA's Messenger spacecraft has found strong evidence for vast ice deposits in ultra-cold, permanently shadowed craters near the poles of hellish Mercury, scientists said Thursday.
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NASA is downplaying widespread speculation that one of the Curiosity Mars rover's instruments, designed to look for organic compounds, has made a major discovery. A news conference is planned Monday. Read More...

Three space station fliers strapped into their Soyuz ferry craft, undocked and plunged back to Earth Sunday, making a fiery descent to a frigid pre-dawn landing in Kazakhstan to close out a 127-day stay in space. Read More...

Buffeted by ethereal whirlwinds and twisters, the Curiosity Mars rover is wrapping up initial soil analysis operations and preparing to move on in search of suitable targets for a compact rock drill. Read More...

NASA's Curiosity Mars rover has not found any definitive evidence of methane in the thin air at the Gale Crater landing site, project scientists said Friday, but additional observations are planned.
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The shuttle Atlantis was hauled out of the cavernous Vehicle Assembly Building for the final time Friday, the last of the iconic winged orbiters to make the transition to Earth-bound museum duty.
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