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TIL that the fear of spiders and snakes is an evolutionary trait, not a learned behavior.

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R7P04 TIL that Michelson-Morley experiments (to prove a theory competing with special relativity) are still being conducted, with the first one dating back to 1881
OGZkL TIL That approximately 460,000 children go missing every year in the USA.
rRORd TIL that Germany opened its Special Forces to women in 2001. Only one woman applied & she failed the requirements. As of 2016, no woman has passed the selection process.
v1Ly8 TIL The Boeing 747 airframe is designed to carry an extra engine called the "5th Pod Ferrying System" for delivering engines to other 747 aircraft on short notice.
Mpd8 TIL Michael Phelps’ lung capacity is twice that of the average human, having 12 liters compared to the average of 6.