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TIL the small cylindrical bulge at the end of laptop charger is an electrical device that helps to isolate the laptop from electromagnetic noise.

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nWNbd TIL that the mosquitoes that bites people are just only the female mosquitoes and that the males are busy with nectar.
w598 TIL that the American accent of the English language was actually the same as the British accent during colonization. Over time, the British accent kept changing while the American stayed almost unchanged.
0wG05 TIL 'Flip-Flop', 'chit chat', 'criss cross', are actually examples of a grammatical rule in English called, 'Ablaut Reduplication'. The rule always follows the same order of vowels, 'I-A-O'. There are no examples of Reduplication that break this rule.
4k9pJ TIL Aristotle wrote the heart has only three chambers, and that tiny organisms can be generated spontaneously out of inanimate matter. It is now known that the left atrium is very difficult to observe and took Louis Pasteur to prove that growth doesn't happen in a container without micro-organisms
WkvVX TIL that viruses infect other viruses and scientists believe a whole class of viruses might exist that infect other viruses.