Message 2005-12-0047: We could be even Martians

Fri, 18 Nov 2005 19:39:38 +0000

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Date: Fri, 18 Nov 2005 19:39:38 +0000
From: [unknown]
Subject: We could be even Martians

Q: Do you think there could have been multiple origins of life, or th=
at life could have come to Earth from somewhere else?

Life arising more than once from nonliving materials could occur else=
where than Earth, but it could also have occurred on Earth. It is pos=
sible that extraterrestrial life exists and that all life nonetheless=
 has a common ancestor. Scientists now believe that microbes can surv=
ive interplanetary journeys ensconced in meteors produced by asteroid=
 impacts on planetary bodies containing life. In other words, we coul=
d all be the descendants of Martians -- or Martians, if they happen t=
o exist, could share a common ancestor with us! In short, the mere di=
scovery of extraterrestrial life doesn't guarantee that life had more=
 than one origin.
Yisrael Asper
Pittsburgh PA


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