"You know those things that you throw the twigs into and it spits them out? That's what I do. The branches are like life, and I throw them into my head and some of it comes out as humor."

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I think that intelligence is such a narrow branch of the tree of life - this branch of primates we call humans. No other animal, by our definition, can be considered intelligent. So intelligence can't be all that important for survival, because there are so many animals that don't have what we call intelligence, and they're surviving just fine.

— Neil deGrasse Tyson