They thrive without oxygen, growing in salty, alkaline conditions, and may offer insights into what kinds of life might survive on Mars. They're a new species of organism, isolated by scientists at the National Space Science and Technology Center (NSSTC) in Huntsville, Ala. The discovery, published in the May 2003 issue of the International Journal of Systematic and Evolutionary Microbiology, identifies a species named Spirochaeta americana by the two NSSTC scientists -- Richard Hoover and Dr. Elena Pikuta. They isolated this new organism from oxygen-deprived mud sediments from Northern California's Mono Lake - a salty, alkaline lake in an enclosed...