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TIL the ancient Egyptians used the urine from a pregnant woman to germinate seeds to determine the sex of the child. If barley sprouted first, then it was to be a boy. If wheat sprouted first, then it was to be a girl.

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WJV9 TIL Many investigators believed that some if not all the crew of The Challenger disaster survived the explosion unharmed and were conscious for the full 2 minutes 45 seconds it took for the Crew Cabin to return to Earth, before being killed by collision force when the module hit the sea.
M7MKm TIL certain moths have developed sound absorbing wings that make it harder for bats to hunt and eat them with their echolocation. The structure of the moth wings might someday help people soundproof places
1PPX TIL that the current Donkey Kong character is not the same as the villain that appeared in the 1980’s arcade games. The original DK is the character now known as Cranky Kong.
nWXxo TIL the BIPM doesn't use a physical rod that's exactly 1 metre similar to the physical "Kilogram" specimen, instead use concise measurement of light & time defined in 1984 by the CGPM as the distance light travels, in a vacuum, in 1/299,792,458 secs with time measured by a cesium-133 atomic clock.
R7mll TIL the HongKong Dollar being pegged to the US Dollar at a rate of 7.80 under the linked exchange rate system, where the government does not control the supply/demand in the foreign exchange market, exchange rate is stabilised by arbitrage where banks sell HongKong Dollar at a gain/loss.