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TIL that human laughter evolved from the distinctive panting by our great-ape relatives during rough and tumble play; that panting functions as a signal that the play is all in good fun and not an attack.

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eYMb TIL Despite having overlapping protection in almost all places, bomb suits leave the hands and forearms completely unprotected so that the technician has greater mobility.
b6p8E TIL that Sgt. Pepper's Lonely Hearts Club Band was the first album to print the song lyrics on the back of the sleeve.
b6RKj TIL: People accused of being witches during the witch trials in colonial New England weren't' burned at stake, they were hanged. One man who was accused of Witchcraft died by pressed to death by heavy stones, another was jailed.
KOwBE TIL that tiny ocean plants called phytoplankton contribute 50 to 85 percent of the oxygen in Earth’s atmosphere.
J1jem TIL: In Michelangelo’s painting The Last Judgment Biagio da Cesena, a priest, is depicted being tortured in hell after complaining about the nudity. He complained to the pope, but he joked that his jurisdiction doesn't extend to hell