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TIL Ancient Mesoamericans discovered how to produce rubber around 1600BCE, more than 3000 years before Charles Goodyear invented vulcanization.

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R5De1 TIL the common ancestor of all vertebrates had not 3 but 4 cones for detecting color. Most mammals later lost 2 cones from being nocturnal and primates evolved one back after that!
GQEQ TIL that McDonald’s Calorie Counters Do Not Cause Consumers to Make Healthier Meal Choices
0KWj TIL the Cold War is credited to have started in Canada, after a Soviet Cipher Clerk defected to Canada and revealed Stalin’s attempts to steal nuclear secrets.
a8e6J TIL the Studio Ghibli Museum in Japan houses several short films that are exclusive and only available to watch there
dDaAQ TIL Kepler predicted that Venus' diameter is almost a quarter of the Sun's diameter, so Mercury should have a tenth of the Sun's diameter. Pierre Gassendi saw the true size of Mercury in 1631 during its transit across the Sun, and was surprised by how small it was as it looked like a sunspot