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TIL a large number of animals have Tapetum Lucidum which is a reflective layer located behind the retina to bounce light a second time to help them see in the dark. Humans don't have this but deer, dogs, cats, cattle, and horses do!

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LQO7d TIL that a 1963 Television western series, "The Dakotas" (starring Jack Elam and Chad Everett), was cancelled almost overnight after viewers called in complaining about a scene in the most recent episode where a lawman murdered two outlaws in a church
awaYZ TIL that loons, of which there are five species, are the closest living relatives of penguins in the northern hemisphere. Unlike most other bird species that have hollow bones, loons and penguins have solid bones which decrease their buoyancy and allow them to dive deep in search of food.
KOdyQ TIL the original Bozo the Clown, who died in 1997, had vision loss in one eye but fooled doctors by memorizing the eye chart so he could serve in WWII
gMpQ8 TIL air conditioning is not popular in Europe. Only 5% of French homes are air-conditioned, 2% of German homes. Many travel sites include horror stories from Europeans describing how "unpleasant the United States is with its artificial cold, and reports of legions of Europeans who return ill."
9wYvD TIL Jackie Gleason, famous for starring in The Honeymooners, was an accomplished musician. Gleason composed his shows' themes and his album, Music for Lovers Only, holds the record for the longest stay on the Billboard Top Ten Charts at 153 weeks.