Within one linear centimeter of your lower colon there lives and works more bacteria (about 100 billion) than all humans who have ever been born. Yet many people continue to assert that it is we who are in charge of the world.

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Quote text and notes from Wikiquote: Neil deGrasse Tyson (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.