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TIL about the Sumela Monastery. Built nearly 4,000 feet up the side of a cliff, it was founded in the 300s. Destroyed and rebuilt several times, mostly during the Byzantine Era, it was emptied and abandoned in the 1920s. Taken over by the Turkish government it has been restored for tourism.

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M7Nv7 TIL the curved surface of the habitat at the end of the movie Interstellar i.e. Cooper station is based on O'Neill cylinders in which two cylinders each 20miles long and 5miles in diameter rotate about their longitudinal axis thus providing centrifugal force serving as gravity.
E9Xx TIL after being selected to have a star on the walk of fame, there’s a $30,000 fee if you actually want it.
X0DMD TIL about Wallace "Wally" Bowers. Struggling to support four kids and a wife dying of cancer, he picked up additional weekend work for a logging company. He was killed during the eruption of Mount St. Helens of May 1980. His wife died three months later from her illness.
KOWLJ TIL there was a train service between India and Sri Lanka, wherein passengers can purchase one single ticket to travel from Madras (now Chennai) to Colombo. They would have had to shift to a ferry for a quick hop across the 35 KM of Palk Strait.
kOGMB TIL that in cases of spinal injury emergency doctors may check for the 'bulbocavernosus reflex' where they squeeze head of the penis or the clitoris while their finger is inside the anus to check for contraction of the anal sphincter. Absence of this reflex indicates spinal cord damage