News Archives Astrobiology Science News 25 October 2006 By Keith Cowing October 25, 2006 Comments by NAS Space Studies Board Chair Lennard Fisk, NAS How Safe is Travel to Mars?, NASA New theory for mass extinctions, AGS Data Analysis on the Extra-solar Planets Using Robust Clustering, arXiv.org Rounding up the wanderers: optimizing coronagraphic searches for extrasolar planets, arXiv.org Radio observations of comet 9P/Tempel 1 before and after Deep Impact, arXiv.org Keith Cowing SpaceRef co-founder, Explorers Club Fellow, ex-NASA, Away Teams, Journalist, Space & Astrobiology, Lapsed climber. Follow on Twitter