AmericaSpace Launch Countdown

Next Launch GPS IIF-8 on a Atlas V 401 rocket from Cape Canaveral AFB, FL
scheduled for:
29 Oct 14 17:21:00 GMT
29 Oct 14 13:21:00 EDT

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Past Oceans on Mars? Maybe - Maybe Not

Did Mars once have oceans? Dueling theories provide conflicting pasts for the Red Planet. Image Credit: NASA / Goddard Space Flight Center

The debate over the history of water on Mars first began even before the first spacecraft flew by the planet. But after Mariner 4 scientists learned that Mars was currently devoid of [...]