The "discovery" of the Piltdown Man was announced on this day in 1912. There's more to the story in the December 26, 2016 episode of Stuff You Missed in History Class.
This Day in History Class
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The first shopping carts are introduced - June 4th, 1937
"Casey at the Bat" is published - June 3rd, 1888
London's Big Ben rings out for the first time - May 31st, 1859