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TIL before people understood where some migrating birds went away to during the winter, it was sometimes theorized that they would hibernate at the bottom of lakes, or simply fly to the moon.

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x6Oj1 TIL about the big sun dial in Cranmer Park in Denver, Colorado, which actually keeps time. The current sundial is the second one as the original donated in 1941 was destroyed by vandals with dynamite in 1965. A replcament was installed in 1966 after a citywide fundraising effort.
eDN4 TIL a London double-decker bus jumped the gap in Tower Bridge when it was opened without warning.
R5WRj TIL: Harvard conducted a study where they track the health of their students from 1938 to 2017. Happiness and close relationships with family are a bigger factor than IQ, wealth, genes, etc in a healthy life. Good marriages lead to less mental deterioration than stressful ones.
rRWVw TIL The vanilla orchid blooms for one day in a year and the flower is only fertile for 8-12 hours. Each flower must be pollinated by hand within that 12-hour window. Unsurprisingly vanilla is nearly as expensive as silver
1ZZX TIL there is an outdoor topless co-ed book club in New York to help the de-sexualization of female breasts