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TIL Lightning is a source of fixed nitrogen, and thus nitrate. Nitrogen in the atmosphere is highly stable and nonreactive due to the triple bond between atoms in the N2 molecule. Lightning produces enough energy and heat to break this bond allowing nitrogen atoms to react with oxygen, forming NOx.

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dDmv7 TIL about RTX, otherwise known as Resiniferatoxin. A compound that is 500x more potent than Capsaicin with a Scoville Heat Unit Score of 16 Billion. Ingesting 1/1,000,000 of a gram can induce severe burning pain and chemical burns.
awZao TIL that Beethoven's 5th became known as the victory symphony because of the allied forces "V for victory" slogan during WW2. After noticing that the first four notes of the symphony sound like the morse code for the letter V, the BBC played that motif on the timpani before every wartime broadcast.
7r4Gb TIL that motorcycle world champion, Barry Sheene, enjoyed smoking so much that he had a hole drilled through the chin-bar on his full-face helmet allowing him to smoke right up to the start of a race. He died aged 52 from cancer of the oesophagus and stomach.
4XBeJ TIL: That "the fist of the sender," the personality of a morse code operator in WW2, could identify allies from enemies, their locations & troop movements, and more. The pace and style of their communication allowed expert operators to track them. This was the precursor to modern keystroke dynamics.
dD6j TIL the kid who plays Luke from “Modern Family” is actually a genius with who graduated high school at age 13. He also is a Mensa member with a 150 IQ