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Life on Earth has evolved to cope with the environment of earth. If the gravity were different it is very likely that life would look very different.

It is likely that if the gravity differed by a large amount then life would not have evolved at all. Too heavy and Earth would have enormous amounts of hydrogen and would be a small gas giant. Too little and the earth could not keep hold of much of its atmosphere. As a result we would have far less CO2 and the surface would be much colder. Also we would loose our precious ozone layer and the surface would be bathed in solar radiation.

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15y ago

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