News Archives Astrobiology News 13 December 2006 By Keith Cowing December 13, 2006 Assessing the massive young Sun hypothesis to solve the warm young Earth puzzle, arXiv.org On the “Galactic Habitable Zone”, arXiv.org Geologists Finding a Different Mars Underneath, NASA NASA Spacecraft Read Layered Clues to Changes on Mars, NASA Mars Express scientists find a different Mars underneath, ESA Keith Cowing SpaceRef co-founder, Explorers Club Fellow, ex-NASA, Away Teams, Journalist, Space & Astrobiology, Lapsed climber. Follow on Twitter