Yes and then it left because the escape velocity was lower with Mars having less mass and therefore gravitational attraction so the molecules eventually left the atmosphere leaving the planet as barren as ever meaning only Earth would have it.
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So you're saying molecules of O2 suddenly left a planet with an Ve of 5 km/s? That doesn't sound right to me.
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Edited by U920628: 6/21/2013 7:31:14 AMAlso due to the fact that the core went cold so the planet had no magnetosphere to hold it all in.
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I don't know how temperature can affect the magnetosphere but okay.
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The magnetic polarity of a planet is caused by mantle magma currents. All the flowing iron creates a magnetic effect, and the points around which it rotate become magnetically charged. [i][b][u]SCIENCE MOTHAFUUCCKKKAAAA!!!!!![/u][/b][/i]
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- Core gets cold. - Convection currents stop circulating - Molten ferromagnetic materials beneath Mars' surface stop moving - The magnetic field fails Although the science of how is a bit iffy.
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Didn't a lot of the water "fly away" during the time of great bombardment?