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80

TIL the first incumbent US President to visit the UK was Woodrow Wilson in December 1918

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LQDm0 TIL That a Panopticon is a specifically designed jail that allows all prisoners of an institution to be observed by a single security guard, without the inmates knowing whether or not they are being watched.
Br6pD TIL that most of the early Islamic heritage sites in Saudi Arabia, associated with family and companions of Muhammad, have been destroyed since the rise to power of Saud family in early XIX century
0a7L TIL In some places the fire department will send you a bill after responding to an emergency call.
4XKL6 TIL Sleep deprivation has opposite effects in healthy people and those with depression. If you’re healthy and you don’t sleep, you’ll feel in a bad mood. But if you’re depressed, it can prompt an immediate improvement in mood, and in cognitive abilities. This is the basis of Wake Therapy
78JwM TIL about Jawhar al-Siqilli, an Italian sodlier-slave in Fatimid hands who gained his freedom after 40 years of slavery and worked his way up to becoming the viceroy of Egypt, there he founded the city of Cairo and the al-Azhar university, the oldest university in the world.