On a 12,742 kilometer diameter rock about 149,600,000 kilometers from a yellow main sequence star, members of a bipedal species that had only been around for 0.0043% of the rock's entire 4,600,000,000 year history thought that they were significant.
This is such a great summary I feel it deserves being repeated.
Source: http://qr.ae/I2uqG
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