NASA's Curiosity Rover prepares to drill, baby, drill

Rovers, landers and satellites have been turning up evidence of a wet Martian history for years. Now, NASA's recently landed Curiosity rover has happened upon even more signs of the planet's watery past: veins of hydrated calcium sulfate (visible in the outrcrop pictured above) stretching across the planet's surface —… » 1/16/13 8:20am 1/16/13 8:20am