November 07, 2014

8:17 PM | Comet Siding Spring Showered Mars with Meteors
When Comet Siding Spring made its historic close approach with Mars last month, the icy interloper showered the Martian upper atmosphere with meteors -- and several robots were on hand to monitor the shower's effects. Continue reading →

November 03, 2014

9:00 PM | Crater Hunters Find New Clues to Ancient Impact Storm
The Earth will never catch up to the moon (let's hope), but the number of Ordovician craters may soon take off.
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