Space.com

What's Hot This Week Martian Life Might Thrive in Lava Tubes, Study Suggests by Charles Q. Choi, SPACE.com Contributor Microbes can survive in frigid lava tubes on Earth - and perhaps Mars as well, scientists say. 12 Must-See Skywatching Events in 2012 by Joe Rao, SPACE.com Skywatching Columnist Venus crosses the sun, meteor showers galore and more grace the sky in 2012. Sponsored by: Scientists Test Tech for Mission to Saturn Moon Titan Twin NASA Probes Have New Year's Date with the Moon