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Phys Org

Phys Org

Science

Science

Why we think Theia existed

Phys Org
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80% Informative

The giant-impact hypothesis posits that billions of years ago a Mars -sized body named Theia collided with the early Earth .

Over time, this debris coalesced to form the Moon.

Mercury and Venus have none, while Mars lays claim to only two small, captured asteroids.

The Earth spins much faster than the other rocky planets, and the Moon orbits around us at a surprisingly swift pace.

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