https://www.youtube.com/watch?v=vM3IEob2QME

Mystery Of A Giant Planet That Went Missing In Our Solar System

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Four billion years ago, Jupiter, Saturn, Uranus, and Neptune battled for positions within our solar system. But some scientists suspect that there was a fifth planet, similar in size to Neptune, that was also part of the battle. Scientists think that a mysterious meteor could be evidence of that fifth Neptune-size planet.

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