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TIL For natural gas appliances the reason you need to hold the pilot button for so long is to heat a thermocouple, which naturally causes a small electrical charge, which activates a magnet that opens the valve letting gas flow. Without this process gas would just keep flowing out.

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K1NG TIL of “Green Boots” - an unidentified corpse that every climber who attempts the Northwest ridge route of Mount Everest passes.
eVv4 TIL that “Winterfell” is the same castle used in “Month Python and the Holy Grail”. Doune Castle.
woYOE TIL about Yagli Gures or Turkish Oil Wrestling. During matches men wear leather pants, are covered in oil, and the main objective is sticking your hand down your opponents pants to gain control.
P1nvV TIL that Walt Disney came up with the modern ski trail designations (green circle, blue square, black diamond).
lolr7 TIL that after Bush Jr. put tariffs on steel imports, what some accused of being a political stunt to get votes from the Rust Belt, the EU threatened to tariff oranges and motorbikes which are big industries in key swing states. Bush responded by dropping the steel tariffs.