Well, if there`s only life on Earth then it would be by a such huge strike of fortune that we exist that I barely can believe it.Originally Posted by Big_John
Moreover; in the early beginning of the Solar System the planets often exchanged big pieces of rock between each other thanks to powerfull impacts from asteroids and comets. That can be compared to "swap spit".
In one theory we`re actually all martians![]()
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