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The earth was formed about how many years ago?
Options
(a) 4.6 billion
(b) 10 billion
(c) 15 billion
(d) 20 billion
Correct Answer:
4.6 billion
Explanation:
No explanation available. Be the first to write the explanation for this question by commenting below.
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Topics: Evolution
(132)
Subject: Biology
(4253)
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