Thread: Ancient Aliens
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Old July 12 2012, 11:48 PM   #164
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Re: Ancient Aliens

Edit_XYZ wrote: View Post
Well, our galaxy is ~13,6 billion years old - but only since ~6 BILLION years there were enough heavy elements for life to be able to form.
This may have been discussed upthread, but... Maybe. Recent discoveries indicate planet formation might have started occuring much earlier than previously supposed, but the data is as yet from too small a sample to draw too may conclusions, especially re rocky bodies.
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