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TIL the Bill and Melinda Gates Foundation donated $4M to help stop malaria in a plan to create genetically modified non-biting male mosquitoes released to mate with malaria-carrying wild females, giving birth to progeny that dies before reaching the human biting age.

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via reddit.com

W7LrN TIL that the geologist Michel Siffre spent 2 months underground without time cues to study how his body clock adapted, repeated the experiment for even longer on himself and more subjects, and discovered that their bodies tended to switch to a 48-hour clock. In one case, one even slept 34 hours.
GAWK1 TIL about Maria Spelterini, who in 1876 became the first (and only) woman to cross Niagara Falls on a tightrope. She crossed several more times with increasingly difficult handicaps: peach baskets strapped to her feet, blindfolded, and with her wrists and ankles shackled together.
laBK TIL the han dynasty of China drilled for natural gas, tranposted it through pipelines and used it in stoves
QJ6Re TIL about Kevin Briggs also known as the "Guardian of the Golden Gate Bridge", a police officer who saved more than 200 people from jumping while being himself depressed.
oB0xo TIL that the formula for napalm was finalized in 1942 on Valentine’s Day and the prototype was first tested on Independence Day of the same year.