Biden undid Trump’s diversity training ban, but it’s alive at colleges

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Watch This Billion-Year Journey of Earth’s Tectonic Plates

Sat Feb 6 , 2021
Unlike on every other rocky planet in the solar system, Earth’s surface is a giant jigsaw puzzle whose pieces are constantly on the move. Each puzzle piece is a tectonic plate, tremendous tartines made of the planet’s crust and a rigid slice of the underlying, squidgy-but-solid mantle. These plates move […]