• TotallynotJessica@lemmy.blahaj.zoneM
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    7 days ago

    My favorite evolutionary fact is how the sperm duct is wrapped around the bladder and pubic bone in humans that have them, forcing sperm to take a long path through the body. It was less of a deal when our ancestors walked on 4 legs, but now they’re wrapped around the ureter which connects the kidneys and the bladder.