Wednesday, February 18, 2009

Mission to Earth

Scientists, including well known physicist Paul Davies, are pursuing the possibility that life happened twice on Earth and that strange, hidden forms of life may exist alongside us. This "shadow life" would be biochemically distinct - fundamentally different than what we consider life. Such life might be sought in places like Mono Lake in California (pictured) where arsenic-dependent microbes have been found.

(image credit: satellite photo of Mono Lake,