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The Earth is 4.6 Billion Years Old

The Earth is 4.6 Billion Years Old

Description:
How old is the earth? When did life begin? When did modern man first appear? Scientists use evidence in order to understand the world around us. This playlist includes some well known scientists explaining how we know the earth is 4.6 billion years old and when life began.
TAGS:
age of earth, modern man, 4.6 billion years, Bill Nye

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