Myth: Humans got HIV because someone had sex with a monkey.
Reality: HIV probably didn’t jump to humans through human-monkey sex. It probably jumped to humans through the hunting of monkeys for… more
Human children don’t get kneecap bones until they’re around three years old.
As Torech noted on Reddit, it takes a while for children to get kneecaps. That part of the skeleton is called the patella.… more