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TIL humans only perceive 0.0035% of the electromagnetic spectrum w our eyes. This 0.0035% is known as visible light and comprises everything the human eye alone can detect in the universe.

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VBV8D TIL that during Watergate, in an effort to stop the Oval Office Tapes from entering the public record verbatim, the Nixon Administration proposed a compromise where Senator John C. Stennis, who was hard of hearing, would listen to the tapes and report on their contents. The plan ultimately failed.
R7D1j TIL that wheelchair athletes with spinal injuries would intentionally injure the lower part of their body to increase their blood pressure which would enhance their performance. This practice is called ‘Boosting’ and has been banned by the International Paralympic Committee since 1994.
oWB8 TIL that, in Mein Kampf, Hitler praised the British and American propaganda system and attributed this to their victory in the First World War; he pledged that Germany would have its own propaganda system the next time around
JjP4 TIL there is a cluster of oil wells on the campus of Beverly Hills High School that generates about $300,000 of revenue per year for the school.
9wJAG TIL Despite the entire animal kingdom in Australia trying to kill you, Australia has a rabies-free status