› added 3 years ago

302

TIL sharks are 90 million years older than trees

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1Bw8 TIL after his horse was deemed unfit to run a grueling 100 mile equestrian race, Gordy Ainsleigh ran it by foot, completed it, and thus launched ultra marathons.
loKO1 TIL A 2008 review of 11 studies found flossing was no more effective than brushing alone in reducing plaque or gingivitis. A 2011 review found "some evidence" from 12 studies, and "weak, very unreliable evidence from 10 studies" that it did. The US government stopped recommending flossing in 2015.
Vlrp TIL: Monday is the day of the week when the risk of heart attack is greatest. Researchers theorise that it’s a combination of too much fun over the weekend with the stress of going back to work that causes the increase.
neRkB TIL about the Guatemala syphilis experiments, US-run non-consensual experiments on vulnerable members of the Guatemalan population. The lead physician John Charles Cutler was also involved with the more well-known Tuskegee Syphilis Study.
bVW9 TIL scientists have found evidence of a flood around 1920 B.C in China that corresponds to the time of Emperor Yu, the legendary first Chinese emperor, who was renowned for his accomplishments in clearing up floodwaters