In planetary astronomy and astrobiology, the Rare Earth hypothesis argues that the origin of life and the evolution of biological complexity such as multicellular organisms, and, subsequently, human intelligence required an improbable combination of  astrophysical and geological events and circumstances that taken together are very very rare in the universe.

How rare planets like Earth are in the universe, which has then allowed intelligent life to form remains to be proven, but the general point of the Rare Earth hypothesis makes us consider that it does indeed take a very particular set of rare events and circumstances to produce life, and intelligent life on a planet – and we should reflect on just how special, amazing and diverse life is on this beautiful planet of ours.

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