We take it for granted that we're able to say things like it's instinctive and it's in the genes because we're not thinking about the broader picture. Genes evolved and function expecting a certain environment, you can expect that to be gravity. And normally they do not have to do anything about providing a gravitational environment. That comes for free.
How do animals know how to do things like spin a web or build a dam? A neuroscientist argues it's not “instinct.” Something bigger is going on.
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