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Bill Nye the Science Guy Answers: How old is the planet Earth?

Bill Nye the Science Guy Answers: How old is the planet Earth?

Author: Bill Nye
Description:

Geology and history come together to create this tutorial that explores the age of the planet Earth. Discover methods scientists use when determining how the Earth developed and how they categorize these changes into eras. From crystal formation and protons to radioactivity of rocks and reptile fossils, you will begin to understand how the Earth evolves and find your place in space.

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Bill Nye: How old is the planet Earth?