[muawiyah]

There was no Moon. Then a Mars sized planet smacked Earth. The residue tossed into orbit coalesced into the Moon. The other planet merged with Earth.

Could 'splain some of the Super Plumes under the Super Volcanos.

[Southack]

A collision should have some Earth material on the Moon, and some Moon material on Earth.

We see neither in amounts consistent with a collision.

Thus, we got our Moon via a capture.