"Human beings are not meant to live alone. There is a fundamental biological imperative that propels you and every organism on this planet to be in a community, to be in relationship with other organisms."

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Darwin's theory of evolution is a framework by which we understand the diversity of life on Earth. But there is no equation sitting there in Darwin's 'Origin of Species' that you apply and say, 'What is this species going to look like in 100 years or 1,000 years?' Biology isn't there yet with that kind of predictive precision.

— Neil deGrasse Tyson