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TIL that in 2014 scientists created a mini penguin rover, or “trojan horse” to learn more about emperor penguins.

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LkMep TIL printers print nearly invisible codes on your documents which contain information like the date and time it was printed and the printers serialnumber. And some engineers outsmarted this.
rr84 TIL of a millionaire who announced he would bury his Bentley for his afterlife. After lots of negative reaction, he revealed the publicity stunt about organ donations. “People bury things that are much more valuable then cars and nobody seems to care”.
VMPxD TIL Insulin shock therapy was used as treatment for schizophrenia. Scientists believed it could jolt the brain out of mental illness or induce the restoration of the normal function. In reality the treatment caused brain damage and a "loss of tension and hostility" that was viewed as therapeutic.
J16y8 TIL of the Stoned Ape Theory, suggesting psilocybin caused the primitive brain's information-processing capabilities to rapidly reorganize, which in turn kick-started the rapid evolution of cognition that led to the early art, language, and technology written in Homo sapiens' archeological record.
E1rrw TIL the 2000 yr old Syrian soap industry finally returned to Aleppo. Their laurel soap is the oldest soap in the world.