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TIL that the word ‘alcohol’ originates from the Arabic word Al-kohl (like the eyeliner). Ancient Egyptians made the cosmetic through a process involving heating. During the Middle Ages, the term was adopted in reference to numerous substances produced through similar means, including “alcohol”.

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6EkXX TIL that the parents of rock musician Geddy Lee (of the band Rush) were Holocaust survivors who had been imprisoned at both Auschwitz and Dachau and had met one another in the Starachowice camp.
b9A09 TIL seahorse couples greet each other every morning with a dance, which sometimes involves changing colour. It is a way of reinforcing their bond and synchronising their reproductive cycles.
jNElE TIL before she became a world famous chef, Julia Child worked as a spy for the Allies during WWII. She also invented shark repellent.
PYdRG TIL that satellites in the 1960s used nuclear radiation for power by radioisotope thermoelectric generators. However, in 1964 such a satellite disintegrated and spread approx. 1 kg of radioactive plutonium-238 over the planet. This failure led NASA to develop solar PV energy technology.
JY89v TIL that when bees finish mating they rip open their abdomen and die a slow, painful death