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TIL that the waffled style ice cream cone, hamburgers, hot dogs, iced tea, cotton candy, and Dr. Pepper, were first introduced to mass audiences or popularized at the 1904 St. Louis World’s Fair

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lENV TIL Adult California ground squirrels have a protein in their blood that allow them to survive rattlesnake bites. The squirrels also heat up their tail and wave them to let the rattlesnake know they are aware of them since rattlesnakes have infrared vision. They don’t do this with other snakes.
EgWyp TIL that Harry Burn, a young state rep, cast Tennessee's deciding vote to ratify the 19th Amendment regarding women's suffrage after he got a letter from his mother reminding him to "be a good boy." The amendment cld not become law without ratification by a min. of 36 states. Tennessee was the 36th.
J1XeQ TIL the French got a concession port in Southern China at Zhanjiang in 1898, with a treaty until 1997 (same date and same idea as Hong Kong). However it was never very profitable or popular, and they gave it back after WWII
yQQQv TIL that Mexican Racing driver Pedro Rodríguez always traveled with a Mexican flag and a record of the national anthem, because when he won the 1967 South African GP the organizers did not have the Mexican anthem, and instead played the Mexican hat dance.
xvn1 TIL There is growing evidence the Amazon Rainforest was actually planned and maintained by indigenous populations by improving the soil and increasing biodiversity