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gort51
I understand that early life on this planet (whether from Space Meteorites or Homogeneous), would have found Earth a much different planet than now.
Billions of years ago, the Earth was still cooling, the Sun was still a larger developing Star, the surface of the Earth must have been almost boiling....with a lack of our type of atmosphere.
It is often hardly ever mentioned about Earth early atmosphere (pre life).
Did we have one? Was it thin? Obviously there was not much Oxygen or Nitrogen?
Where did the gasses come from?
TRiPWiRE
I'm always a tad confused as to why they think anything living out there would require the same (or similar), environmental conditions as us.
Just because we need certain temperatures and conditions to survive and thrive here doesn't (to me), mean other species elsewhere would be the same. We have organisms here on Earth that can survive boiling hot conditions (as seen around underwater volcanos etc), so it seems odd to only look to these planets that exist under these conditions.
Who's to say "Mr Blue Alien Man" cannot survive double our gravity and temperatures we have here? If that's how they evolved then it seems quite possible this could occur.edit on 13/1/14 by TRiPWiRE because: (no reason given)