News Archives Astrobiology Science News 21 September 2007 By Keith Cowing September 21, 2007 Blind Signal Separation Methods for the Identification of Interstellar Carbonaceous Nanoparticles, arXiv.org Keith Cowing SpaceRef co-founder, Explorers Club Fellow, ex-NASA, Away Teams, Journalist, Space & Astrobiology, Lapsed climber. Follow on Twitter