› added 3 years ago

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TIL that purple is a "non-spectral color", which means that it exists only in our minds: there is no wavelength of light that corresponds to it. Our brain perceives purple when it sees a mixture of strong red and strong blue light, without any green.

Read more hyperphysics.phy-astr.gsu.edu

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v1okL TIL that black holes 'sing' at a frequency similar to a B flat, but located 57 octaves below middle C.
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OG0R TIL that the patterns seen when taking hallucinogenic drugs are actually created by the arrangement of cells and interlinking of nerves in the eye and brain
p8wLb TIL the former dictator of the Central African Republic, Jean-Bédel Bokassa, forced the nation's school children to buy expensive uniforms from a company he owned. When the children protested, he had 100 of them executed as an example.
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