The SciencesFoiling a Faint SunHungry bacteria may have warmed an ancient earthBy Sarah Simpson on April 1, 2003Advertisement Rights & Permissions ABOUT THE AUTHOR(S)Recent Articles by Sarah SimpsonAfghanistan: Rare Earth Elements Could Beat the Taliban [Slide Show]Afghanistan Holds Enormous Bounty of Rare Earths, MineralsAfghanistan's Buried Riches