How did our moon form? The prevailing theory goes something like this: baby Earth collided with a Mars-sized protoplanet called Theia. The debris from the collision then went on to form the moon. There are some issues with this theory, though, which open the door to a completely different hypothesis. Watch the video below to learn about it.
Our Moon Might Be Made Up Of Many Smaller Moons
The chemistry doesn't add up to support the prevailing theory.
How Did The Moon Form?
Fraser Cain reviews the different hypotheses behind how the moon came to be.
Written by Curiosity Staff January 13, 2017
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