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TIL The airline industry has its own currency (NUC) to simplify the exchange of money between airlines

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4XPN6 TIL that dolphins have learned to use rudimentary tools. For example, mother dolphins teach their young to cover their snouts with sponges while foraging on the ocean floor. This prevents them from being stung by venomous creatures.
OoWg4 TIL DeepSqueak software identifies rodent vocalizations using neural networks like those developed for self-driving cars. Researchers have found about 20 different calls, such as happy ones when anticipating a reward or playing with friends, or courtship when males are with females.
Olga TIL When Britain began to impose prohibition of heroin, in 1968, there were fewer then 500 heroin addicts. By 2001, the Home Office says there were as many as 500,000.
nemE9 TIL In the 1960's McDonald's was prepared to abandon its logo of the golden arches of the letter M, but psychologist Louis Cheskin successfully urged the company to maintain this branding because of their "Freudian symbolism of a pair of nourishing breasts."
BElr TIL Cats have a very small prefrontal cortex, making them rather impulsive creatures.