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TIL of PFOA or C8, better known as Teflon. Teflon(PFOA) is considered a "forever chemical" in that there is no naturally occurring process that can break it down. It's now found in the blood of 98% of humans in the U.S. And is specifically linked to 6 cancers/health aliments.

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D1WEg TIL after the Apollo 11 crew returned to Earth, they were quarantined for 3 weeks to prevent any possible microbes from the Moon infecting Earth. However, Buzz Aldrin saw ants crawling in and out of cracks in the concrete, meaning even smaller microbes could have gotten in and out of quarantine.
yQ8V TIL the Japanese have onomatopoeias for essences as well as sounds. A notable example is “pika pika,” meaning “to shine”
rRyYe TIL in reference to Donald Duck’s nephews Huey, Dewey, and Louie, Disney's archivist Dave Smith, in "Disney A to Z", said, "Note that the brightest hue of the three is red (Huey), the color of water, dew, is blue (Dewey), and that leaves Louie, and leaves are green."
woxe1 TIL that Microwaves generate heat, (not as popularly conceived (having a resonant frequency similar to water)), but instead, by matter doing it's best to magnetize itself.
woMZ8 TIL Suriname, which has the highest percentage of Muslims in the Americas, has two different groups of Muslims from India and present-day Indonesia who preyed to Mecca in completely different directions as they entered and settled in Suriname via the Atlantic and Pacific Oceans respectively