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TIL that just like humans, dogs have an oil on their bodies that converts to vitamin d when exposed to the sun. Unlike humans dogs cannot absorb this oil, and must instead invest it via licking and grooming.

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W7d0B TIL that Edgar Allan Poe became a writer after a failed military career. He enlisted in the US Army in 1827. He failed as a cadet at West Point, and declared his intention to become a writer. His first works (a collection of poems) were written while in the Army
mxdVv TIL of Girgori Perelman, the only person in history to have solved one of the seven Millennium Prize Problems. After solving the Poincaré conjecture Perelman was offered the Field's Medal and $1 million prize money, he declined them both.
WkQPX TIL Konstanz is one of the few towns in Germany left untouched by the Second World War. Instead of blackout, the city would leave all its lights on at night in order to fool Allied bomber crews into thinking that it was part of nearby Switzerland.
6E9WW TIL that verbs comprise approximately 75% of the Cherokee language, as opposed to only 25% of the English language. Verbs must contain at minimum a pronominal prefix, a verb root, an aspect suffix, and a modal suffix.
6WjJ TIL there was a man in 1987 named Kenneth Parks who was acquitted of murder and attempted murder because he was sleepwalking