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  1. M

    Early Earth Atmosphere

    If Mars used to have a denser atmosphere in the past, could Earth have had one as well?
  2. M

    Anyone know how much xenon is in our atmosphere?

    anyone know how much xenon is in our atmosphere? This is where we get it right?
  3. M

    Can planet rotation slow down?

    But I do believe it is thought that near the beginning of the earths existence, 14 hour days were had. Nothing to do with a flood.
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