[meteorite-list] Plausibility of Martian Microbes

Francis Graham francisgraham at rocketmail.com
Tue Apr 27 19:23:47 EDT 2004

> one can ask the
> following questions: On which planet did life
> originate? Could life have
> originated on Mars and been transferred to Earth or
> vice versa?

  If Mars had lakes and conditions hospitable to at
least microscopic life, and Earth had life at that
time, then the ONLY way MARS could NOT have had life
is for there to be an exact 100% chance that any
meteorite from Earth was completely sterilized by the
space environment before reaching Mars. 99.999% isn't
good enough, because of the many chances of Earth
meteors. Why there must have been hundreds of Earth
meteorites hitting Mars from the Sudbury and Hudson
Bay impacts alone at the time, give or take a thousand

Francis Graham

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