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TIL superhero is a trademark co-owned by DC and Marvel Comics, and no one else is permitted to use it on the cover of any comic book or magazine.

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Z8yJo TIL Shinjuku Station in Tokyo is the busiest transport hub in the world - used by an average of 3.6 million people per day
AlO4 TIL that cats have no naturally occurring antibodies against dogs blood so can receive dogs blood in life threatening situations. But only once. The second time proves fatal.
PDLE TIL the Hollywood Walk of Fame star for Muhammad Ali is the only one that’s placed on a wall and not the ground, because Ali “did not want the name of Muhammad to be stepped on”
Pj7E TIL Listerine coined the term ‘halitosis’ in order to boost the sales of their mouthwash by telling people that they had a health condition. This has historically been one of medicalization’s most successful stories.
N7yOP TIL The average adult in Indonesia is around 5 feet 1.8 inches tall, making it the country with the lowest average height in the world.