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6

TIL of a Victorian-era English recipe for a toast sandwich: Two pieces of bread with a slice of toast in between. Modern reviews have ranged from calling it “just not that good” to “an extravagance of blandness.”

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epBe5 TIL Roman concrete's durability is a result of hot mixing, which creates lime clasts that "self-heal" cracks whenever they are exposed to water.
9YZpr TIL that Ethernet inventor Robert Metcalfe predicted that the internet would collapse in 1996, promising to eat his words if not. In 1997, he took a printed copy of his column that predicted the collapse, put it in a blender with some liquid and then consumed the pulpy mass.
9EwQ TIL 1/3 of homeless people in the United States have schizophrenia or bipolar disorder (approx. 250,000 of 744,000).
LQkZV TIL about Kriegspiel, a chess variant where each player can see their own pieces, but not those of their opponent. Players attempt to move on their turns, and the umpire declares their attempts 'legal' or 'illegal'. If the move is illegal, the player tries again; if it is legal, that move stands.
gB8 TIL that Abraham De Moivre, a French mathematician, successfully predicted the date of his own death in 1754