earth's history
By cdisya
@cdisya (36)
Indonesia
July 28, 2010 4:18am CST
history of earth formation can be studied through its crush. the crush that is formed from rock kept a lot of fossis and revealled the history of life on earth. earth,s history can be explained into a period called 'era'. there are four eras in earth's history, namely Pre Cambrium, Paleozoic, Mesozoic and Kenozoic
1 response
@rameshchow (4426)
• India
28 Jul 10
hi cdisya, please chooose some important discussion.........
Then we have a chance to encourage you.........
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