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TIL that if someone tells you to 'relax your tongue' and you start thinking about it and it starts to cramp, say "N". This returns the tongue to neutral position at the base of the top incisors, in addition to returning jaw muscles to neutral position for people with bruxism.

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aw190 TIL that the paper used in store receipts contains high levels of BPA, a toxic, cancer-causing chemical that can be absorbed through the skin.
6EOKJ TIL that Ireland, Iceland, Greenland, Antarctica and New Zealand are the only countries in the world with no native or wild snake populations.
69omJ TIL following Usain Bolt's achievement of a new 100 m world record at the 2009 Berlin World Championships, the mayor of Berlin presented him with a 12-foot-long, 6,000-pound piece of the Berlin Wall. Bolt accepted the gift and it is now on display at the Jamaica Military Museum.
xV7mg TIL locusts are not a species. They are actually grasshoppers which have developed gregarious characteristics in suitable environmental conditions forming an organized group
dD6WB TIL that the memorial sign dedicated to Emmett Till, a 14-year-old african-american boy who was lynched for whistling at a white woman in Mississippi in 1955, have had to be replaced four times because people kept shooting them full of bullet holes. In 2019, a bulletproof sign was finally erected.