Posted by KarenYoo on December 03, 1997 at 22:54:55:
Professor Huffman,
On the review sheet under chapter 18 it says to know a rough
time scale for the development of life on earth. I
couldn't find the information for this so I was wondering
what we should know, and where to get the information.
If you could help me I would really apreciate it.
Thanks Karen Yoo
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