Comments by "marie parker" (@marieparker3822) on "Harvard's Top Astronomer Believes Aliens are Trying to Contact Us | Dr. Avi Loeb" video.

  1. The low gravity of Mars would give us osteoporosis, so we wouldn't be able to move.
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  2. Another planet which would be suitable for our colonisation would already be inhabited by people/aliens who would not welcome us.
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