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TIL Brushing your teeth after vomiting is terrible for you as the stomach acid destroys the enamel.

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R74d6 TIL Dr. Hans Asperger, who first identified what would become known as "Asperger’s syndrome", personally recommended some of his child patients to be transferred into the Nazi's "child euthanasia" programs, including one where at least 800 children were killed. He later worked for the Hitler Youth.
R5K01 TIL about Roy Sullivan, a park ranger at Shenandoah National Park in Virginia. He holds the record for being struck by lightning more times than any other human being. Between 1942 and 1977, he was struck by lightning seven times.
VMpvp TIL withouth Alaska, the United States has a smaller area than Brazil
X0XKQ TIL aircraft carriers have "barricades" set up - giant tennis nets essentially - to catch landing fighters that failed to hook onto the arresting cables.
epxnJ TIL Approximately 10 percent of U.S. adults are classified as having obesity during the 1950s.In 2011 to 2012, however, the CDC reported approximately 35 percent of U.S. adults had obesity; the prevalence of obesity among American adults has more than tripled within the last six decades.