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December 19, 2014

Homework Help: geololgy

Posted by anonymous on Tuesday, May 24, 2011 at 9:24am.

Earth and Venus are so similar in size and overall composition that they are almost “twins.” Why did these two planets evolve so differently? Why is Earth's atmosphere rich in oxygen and poor in carbon dioxide, whereas the reverse is true on Venus? What would happen to Earth's oceans if Earth were a little bit closer to the Sun?


What might have happened to mammals if the end-of-Cretaceous extinction had not wiped out the dinosaurs?

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