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TIL Berlin still hasn’t recovered its pre-WW2 population

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KOr09 TIL a monarch butterfly's antennae have a number of important functions including sensing pheromones, detecting water vapor, locating food and navigating.During migration, in particular, antennae are necessary for proper time-compensated solar compass orientation when travelling very long distances.
W7ggN TIL Saint Catherine was tortured on a wheel by the Emperor Maxentius for refusing to renounce her Christian faith. The wheel broke and Catherine was eventually beheaded instead. Her martyrdom is remembered in the firework called the 'Catherine Wheel'.
wo0v7 TIL it is believed 2,000 black people were killed in concentration camps during World War II.
a8NLy TIL It's physically impossible to sink entirely in quicksand
7rN6L TIL from 986 CE, Muslim Turks started raiding northwest India from Afghanistan, plundering western India. Forced conversions to Islam were made, and Buddhist images were smashed due to the Islamic dislike of idolatry. Hence, the Islamic term for an 'idol' became 'budd'.