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TIL the blue LED was almost impossible to make due to difficulties manufacturing the key material, without defects

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OvL1 TIL of Hajimi Fuji, who volunteered for the kamikaze but was refused acceptance because he had a wife and two young children. To honour his wish his wife drowned her two young girls and drowned herself. Hajimi then flew as a kamikaze pilot,meeting his death on the 28th May 1945.
wooAM TIL that expectant fathers experience hormonal changes as well. Testosterone and estradiol are lowered.
RZr6 TIL the Confederate Battle Flag, the modern day symbol associated with the Civil War, was never formally adopted by the Confederate congress nor flew at any state capitols. It became popular due to its use by the KKK and Southern Dixiecrats during the mid 20th century.
yQPLX TIL the difference between the black and white rhino has nothing to do with color. The black rhino has a narrower mouth while the white, or “wide” rhino has a wider mouth better for grass eating. White Rhino came from Wide Rhino as an error in translation from South African Dutch “Wijd Rhino”
Zbbv TIL that Carrie Fisher regularly got high on cocaine on set of The Empire Strikes Back, it got so bad that even John Belushi told her she had a problem.