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TIL In 1967 Sweden switched from left-hand driving to right-hand driving. All vehicles had to come to a complete stop at 04:50, then carefully change to the right-hand side of the road and stop again before being allowed to proceed at 05:00

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YOPP TIL of the intense world theory of autism - which suggests that autistic people shut down because they experience and feel too much
ZpYDD TIL the Inca Empire had a messenger system so fast it could deliver a message over 300 km (190 miles) in a single day, thanks to a network of elite runners known as "chasquis". It was so efficient that even in Cuzco, hundreds of km away from the sea, the Inca ruler could enjoy fresh fish
M7M9V TIL Temmler Werke (company that supplied Nazi meth) was still making Pervitin and selling it to the East German army until 1988.
wLWxJ TIL that Jim Hanks, the brother of Tom Hanks, does the voice acting for Woody in many commercials, shows, and games while Tom does the big movies and shows
7r5wr TIL the small town of Rangely, Colorado is home to a disused water tank that was repurposed into a concert and recording venue due to its internal resonance of up to 40 seconds.