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TIL the world record in holding the breath is at 24 minutes 37.36 seconds.

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5odr TIL that a gallon of gasoline has 31,000,000 calories.
m100R TIL Mail carriers can be fired for not delivering junk mail.
NXA9E TIL that for training purposes and to avoid the risk of creating political tensions with actual countries, the U.S. Army has created over 20 incredibly detailed and intricate fictional nations, all including maps, flags, populations, etc. Each one is the "counterpart" of an actual nation.
DR0D TIL 60 tons of mammoth tusks is excavated every year and marketed as an ethical source of ivory. It sells for ~$350/kg
OGJKY TIL about the medical "interventions," more accurately experiments on "prisoners" in British India for malaria, cholera, typhoid, & plague. In one incident, Muslim prisoners fasting for Ramadan were forcibly given weekly doses of quinine for malaria treatments.