alt Hacker Newswhat's really going to blow your mind is our solar system looked completely different several times with different proto-planets and Earth/Moon is likely made from remnants of those other planets
* https://en.wikipedia.org/wiki/Formation_and_evolution_of_the...
The Youtube channel Kyplanet recently had an episode on recent arguments that the Earth/Moon system was formed from at least three giant impact events, not just a single one between proto-Earth and Thea that formed the current Earth and the Moon.