"A meteorite designated ALH84001 became famous in 1996, when a group of scientists led by David McKay, Everett Gibson and Kathie Thomas-Keprta of NASA's Johnson Space Center announced that it contained evidence of past life on Mars. That claim has since been widely debated, and non-biological accounts of the same evidence have emerged.
Now the NASA team has used new tools to model the principal non-biological scenarios; they find them untenable. "We conclude that the vast majority of the nanocrystal magnetites present in the carbonate disks [example, right] could not have formed by any of the currently proposed thermal decomposition scenarios." Therefore they believe, Ancient life remains the most plausible explanation for the materials and structures found in the Mars meteorite."
Dontcha see! If there was life on Mars several billion years ago, in an environment that likely was far less hospitable to life than the earth was subsequently, it means either that 1) life will emerge wherever there's an adequate environment or 2) life is a ubiquitous feature of the cosmos and is being seeded throughout interstellar space to every liveable niche in the cosmos
Cain't wait for the announcement of the hyperspace warp drive..
R.
P.S. I read recently that scientists have theorized that an ideal environment for what they conceive of as the orgin of life would be a planet with a lot more mass than the earth and in a zone around its star that would make it quite a bit warmer.
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