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TIL the Browns were the first team to use a radio inside of a helmet. During the 1956 season opener in Chicago, quarterback George Ratterman wore the helmet and had to contend with outside interference. “I’m getting cab calls from Michigan Avenue to State Avenue,” he complained to his teammates.

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p8LKN TIL about Tennis for Two, a 1958 video game played on an oscilloscope invented by a physicist at Brookhaven National Laboratory for a public exhibition. Largely forgotten until patent litigation in the 1970s, it was the first video game developed purely for entertainment.
yxNp TIL: A quarter of the world’s hazelnut supply is used to make Nutella
ADR07 TIL that all current Syrian hamsters are descended from two siblings that mated in a 1930s laboratory. The other lab hamsters were all eaten by their mother/sibling, killed with cyanide or escaped.
P44g TIL that MIT and CalTech maintain a “bitter” rivalry despite being 3,000 miles apart. Unlike most rivalries, it’s based largely on pranks–including the theft and transport of an antique cannon from one campus to the other, and the appearance of a “TARDIS” on top of a student hall.
Me5wW TIL that a Decibel is not its own unit, but actually 1/10th of a Bel, a unit named in honor of Alexander Graham Bell for his contribution to acoustics.