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TIL the Original Ronald McDonald was fired for being overweight

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9YdyM TIL That sharks don't blink. To protect their eyes some sharks roll their eyes backwards to protect them when striking prey.
ne087 TIL the first person to ever observe individual living sperm cells was Antonie van Leeuwenhoek who collected a sample from his wife immediately after intercourse. In his 1677 letter to the Royal Society, “de Natis e semine genital Animalculis,” he describes a scene teeming with tiny “animalcules.”
8Z4b TIL that in 1925 KKK membership peaked at somewhere between 3 and 6 million, meaning that at least 2.6% of the population of the united states was a member
QJJAe Assuming you could withstand the heat
rRRb4 Short answer: It's volatile