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TIl that industrialist Andrew Carnegie spent $56.2 million to build 2509 libraries across the world. Known as Carnegie Libraries, cities had to follow a strict maintenance commitment to obtain funding. Today, there are an estimated 900 Carnegie Libraries operating in the United States.

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yVrp8 TIL about fire classes (in the USA) which each have specific ways to extinguish them—A (ordinary combustibles), B (flammable liquids/gases), C(electrical fires), D (metals like elemental sodium in water), and K (lipids/fats like kitchen fires).
vkEx TIL that Michael Crichton only wrote his novel The Lost World, sequel to Jurassic Park, when being pressured by fans, critics and Steven Spielberg, who wanted to make another movie. It was the only sequel he ever wrote.
p80gA TIL the inventor of the sewing machine had a dream where cannibals were going to cook him. In the dream their spears had holes at the tip that they raised up and down. This inspired him for the breakthrough of the machine, putting a hole at the tip instead of the base.
N7bZ1 TIL that it is impossible for a human to sneeze during sleep due to a bodily state known as REM Atonia as reflex signals are not communicated to the brain.
DQ5De TIL there are 5 general foot shapes and there are positives and negatives to each shape.