Planet Earth is 4.54 billion years old, but how do we know that?
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The age of the Earth
Planet Earth is 4.54 billion years old, but how do we know that?
Planet Earth is 4.54 billion years old, but how do we know that?
SelfAwarePatterns 
Thanks for the reblog Mike! Already people are asking me hard questions that I am going to have to research, so if you know any of the answers, please feel free to dive in and help me out!
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My pleasure Steve. It was an excellent post! I’ll try to pop over later today and see if there are any questions I know the answer to.
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