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TIL “Con Man” is short for “Confidence Man” based on Samuel Thompson, a man who would ask people to give him money or their watch to show their confidence in him.

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Z8ZQR TIL that Peter Cullen — voice actor for Optimus Prime, the Predator, and many other voices in film — came up with the Predator's clicking sound because he was coughing blood after voicing King Kong's roars and couldn't do a traditional monster sound.
0wY4y TIL: Rural Indiana lore has long claimed that much of the world's first-ever Ferris wheel was recycled and made into a bridge by farmer J.D. Dunn. Dissenting opinion says the salvaged metal came from the world expos of either 1893 or 1904.
b9Oop TIL that the first vending machine was invented 2000 years ago in Roman Egypt and sold Holy Water. When the coin was deposited, it fell upon a pan attached to a lever which let some water flow out. A counterweight snapped the lever up and turned off the valve once the coin was tilted off the pan.
7BaX TIL that the worlds most powerful nuclear-powered icebreaker which routinely visits North Pole can’t cross the equator and sail to southern hemisphere: the tropicals waters are too warm for it to operate
wBN6 TIL there is a 5000 year old refrigeration technique using only principles of evaporation and humidity that can be produced with basic pottery, sand, a rag, and water.