What is a most interesting question, that no Scientist has been able to answer is:
how did Life ever get to Earth to begin with? Since life is absolutely impossible in Space, even basic bacteria will instantly Die in Space. So how on Earth did Life ever get to Earth, unless a Space Ship brought it here!
You can try to give a Religious (Christian, Islam, Judaism, other) answer to this fundamental question, but lets face the fact that Biblical explanation of this profound question are too simplistic to put it mildly.
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