Hot answers tagged

4

Interestingly, the same question you asked has been asked since quite some time: The Act of Creation, 1964 - Arthur Koestler What is the survival value of the involuntary, simultaneous contraction of fifteen facial muscles associated with certain noises which are often irrepressible? Laughter is a reflex, but unique in that it serves no apparent ...


3

Since this (excellent) question has been around for a while without any answer, I thought I'd give my two cents, like the help centre suggests. Other people may be able to expand on this and find appropriate sources, research, etc. I think we do this as a gesture of respect to the other person. We may fear that if we don't acknowledge them at all, it will ...


3

Human's fear of the dark comes from our evolutionary past. Scientists believe it is genetically encoded in our DNA to be afraid of the dark due to the attacks of predators on our ancestors mostly occurring at night. Our ancestors who were afraid of the dark survived predator attacks and thus lived, transferring that trait to us. Fear is normal and usually ...


2

I agree. The connection between having sex and the pain of labor is so distant, it seems unlikely that it could be selected against. In theory though, there could be enough time in human history for it to have happened, especially early on when child mortality was much higher than now. If every mother who remembered extreme pain in labor never gave birth ...



Only top voted, non community-wiki answers of a minimum length are eligible