Earth formed (solidified) 4.6 Billion years ago.
Life emerged between 4.5 -3.8 Billion years ago. That means that as soon our planet wasnt a bubbling hellscape life started to appear. Considering that so far every sun we have trained our really nice telescopes on has a planetary system similar to our own, life should be incredibly common throughout our universe. (Industrial Intelligent life though is a different matter entirely).
Submitted September 20, 2018 at 12:10AM by Inesophet https://ift.tt/2xo7NiP
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