Unsolved mystery 8 - If Earth formed through collisions of space debris, how did it become layered

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What had to happen to the proto-Earth rubble pile to allow it to become differentiated?

  • Had to partially melt it

  • Heat from collisions

  • Causes dense stuff to sink and light stuff to rise to the surface

<ul><li><p>Had to partially melt it </p></li><li><p>Heat from collisions </p></li><li><p>Causes dense stuff to sink and light stuff to rise to the surface </p></li></ul><p></p>
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