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TIL that a robot fish invented to mimic the natural predator of the 'mosquitofish' was so effective that it altered their behaviour, physiology and fertility, effectively "scaring them to death".

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8elVX TIL As opposed to having XY chromosomes (found in mammals), birds, some fish, crustaceans, and insects have ZW system, where males typically have ZZ and female ZW chromosomes.
n1yP TIL Ecuador’s large monument to the Equator is not really on the equator. They marked the wrong spot 200 years ago and didn’t realize it until GPS was invented.
wLZKo TIL the Beatles Wanted To Make A 'Lord Of The Rings' Movie In The '60s directed by Stanley Kubrick. Tolkien, who had the film rights at the time, shot the idea down. Kubrick then went on to make 2001: A Space Odyssey.
Oob7g TIL: Waka Flocka Flame, Kesha, and John Cena got higher ACT scores than Steve Jobs and three U.S. presidents.
KOrVJ TIL that Jean Valjean, the main character from Les Miserables, has a father, mother, and sister that are canonically named Jean, Jeanne, and Jeanne respectively.