Why is it that scientists know less about the first four-fifths of Earth's history than about the last, most recent one-fifth?

Name: Why is it that scientists know less about the first four-fifths of Earth's history than about the last, most recent one-fifth?
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The Answer of Why is it that scientists know less about the first four-fifths of Earth's history than about the last, most recent one-fifth?

Why Is It That Scientists Know Less About the First