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TIL Korea has had underfloor heating for thousands of years.

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bo6a TIL that professor David Nutt (psychiatrist and neuropsychopharmacologist), and the U.K.’s Chief Advisor on Drugs Policy, was sacked in 2009 when all his research proved that ecstasy and weed were less dangerous than alcohool and tobacco.
x6A6g TIL about the submarine USS R-14, who in during a rescue mission in 1921 had its fuel contaminated with seawater, cause the loss of battery power and radio communication. Its crew were able to make the 161 mile return trip to homeport by creating sails out of hammocks and blankets.
989B TIL that a toilet was dropped as a bomb from an airplane during Vietnam war
Jdel TIL that Peter Brabeck-Letmathe (Chairman of Nestlé) said that the idea of water as a basic human right is “extreme”
myLO TIL that genetically engineered “ray cats” with fur that changed colour in the presence of radiation were considered by scientists to warn future civilisations of nuclear waste