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TIL the one-way speed of light has never been measured, and light could theoretically travel at different speeds in different directions

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kOgGm TIL Late piano virtuoso Glenn Gould spent only 10% of his time at the keyboard in the studio and the rest working on the recordings itself by editing, splicing and supervising the record to achieve the best, absolute and note-perfect version of his playing.
0d6Jv TIL that a "frown" means something different to many people around the world. Some people believe it is primarily an expression of the eyebrows, while many others associate it with a downturned mouth.
JGNm TIL that a woman from Northern England has 4 functioning colour cones (most of us have only 3) and that due to this she can see 99 million more colours than the average person.
4yxN TIL that a 2012 paper found evidence of systematic electronic vote rigging in the 2008 US General Election and 2012 Republican Primaries
OGYaX TIL that in 2014, a scientific paper was published with the phrase "get me off your f****g mailing list" repeated many times. The authors helped exposing what is known as a "predatory journal".