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· Ancient Earth

The world before us

Dinosaurs, mass extinctions and the planet that came before this one.

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  1. 01

    The 60 Million Years When Wood Was Immortal

    For millions of years, dead trees simply piled up on the ground because nothing on Earth knew how to eat them.

  2. 02

    The Golden Crust That Is Too Deep to Reach

    Earth is hiding enough gold in its core to coat the entire planet in a knee-deep layer of precious metal.

  3. 03

    The Top of Mount Everest is an Ancient Ocean Floor

    The highest point on Earth is covered in 400-million-year-old sea creatures stuck in the limestone.

  4. 04

    Why the megalodon really went extinct

    A 60-foot shark didn't die from a meteor. It starved.

  5. 05

    Earth had purple plants before green ones

    For a billion years, the planet probably looked like Mars in lavender.

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