Researchers think they have found traces of ammonia in Mars' athmosphere. Since ammonia is degraded quickly there, if this were true, it would mean the presence of some ammonia-producing source on Mars. THe best bets for that would be either active volcanoes or microbes, but since active volcanoes have not been found on Mars, it might mean there is life there! Here's the article (found at richarddawkins.net): http://news.bbc.co.uk/2/hi/science/nature/3896335.stm Anyhow, for those who haven't heard it before, here's David Bowie's great song: EDIT: Oops, that article was 4 years old, don't know why richardawkins.net put it up in the news section.. The findings have later been debunked.