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4:52
YouTube
Be Smart
Why Does The Earth Have Layers?
...or why do we live on an onion made of magma? Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate Subscribe to It's Okay To Be Smart: http://bit.ly/iotbs_sub Thanks to Miles Traer and Mike Osborne for geophysics help on this one! Why does Earth have a liquid core, and ...
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