The mediocrity principle is the notion that there is nothing special about humans or the Earth. In a broader context, the mediocrity principle states that: life on Earth depends on just a few basic molecules; the elements that make up these molecules are (to a greater or lesser extent) common to all stars, and the laws of science we know apply to the entire universe (and there is no reason to assume that they do not). Thus, given sufficient time – life must have originated elsewhere in the cosmos.
The Daily Omnivore 
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