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TIL: The first chemotherapy drugs were derived from Mustard gas - a chemical warfare agent used during WWI

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B5yx TIL that until the 17th century most scientists believed that the speed of light was infinite. It was only in 1676 that Ole Rømer and Giovanni Cassini made the first measurement of the velocity of light (just 27% off the real value) by observing the orbits of the moons of Jupiter.
Z8P74 TIL that Neff (2003) argued that compassion is our common humanity and that Gilbert and Choden (2014) say that because of this compassion isn’t unidirectional but it is a dynamic flow reflected in actions of love and kindness towards each other.
OGngX TIL one of the key factors in the Nazi Blitzkreig was the wide use of Pervitin, an over-the-counter methamphetamine, available in Germany. The drug allowed soldiers to go sleepless for up to three nights and "dulled feelings of empathy, hunger and thirst and reduced sensitivity to pain."
Br9Me TIL in 2008, Elijah Wood became the first person ever to cross Victoria Falls by rope
JY8pB TIL Hitler went to sleep very late the night before D-Day. He gave orders not to be woken up for any reason. His staff obeyed the order. When Hitler woke up, it was too late to stop the invasion.