› added 3 years ago

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TIL sperm don't race to the egg. They are passively transported via "pumping & wafting", weeding out the high number of "duds" that human males have. Many are stored in side-channels for up to 10 days. The sperm introduced to the egg are a random sampling, & don't represent "survival of the fittest"

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nkZB TIL: Gordon (sesame street) has been played by the same actor since 1974
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