[CobaltBlue]

This is sort of OT but speaking of self-selection, have you read any of the recent research on human sperm? There are different types of sperm that have different functions - killers, blockers, and egg-getters.

[blam]

"This is sort of OT but speaking of self-selection, have you read any of the recent research on human sperm? There are different types of sperm that have different functions - killers, blockers, and egg-getters."

Yup, read that too. I had a discussion with my son( Dr blam) at Christmas.

I proposed to him that humans are evolving daily to comprehend pollution and all the other things that we're worried about these days. The 'selectivity' is occuring at the egg/sperm interface and post fertilization spontaneous abortions. If the mother's body is polluted, only the unions that can withstand the pollution will survive to birth. So...we're having births of stronger humans daily.

[Mike Darancette]

There are different types of sperm that have different functions - killers, blockers, and egg-getters.

Like a little Hockey Team in there. :)