› added 3 years ago

74

TIL the first Blue LED wasn't commercially available until 1989 and bright blue LEDs weren't available until 1993.

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WkP9N TIL that while undergoing screening for kidney donation to her son, a 64 yr. old woman found she had no gallbladder and no spleen despite never undergoing surgical removal. The rare birth defect was diagnosed, and she was still able to donate her kidney.
loxv7 TIL that Eminem watched his daughter, Hailie, get crowned homecoming queen from an empty classroom in the school because he didn't want to take the attention away from her.
pY09Q TIL about primordial black holes (PBHs), hypothesized to have formed in the early universe; some small extra-dense spots collapsed into black holes as everything expanded and cooled down. It's also been hypothesized that dark matter, which constitutes 85% of the universe's mass, is made up of PBHs.
6ZpJ TIL that a good old-fashioned fistfight between consenting parties is legal in the state of Washington.
mNwM TIL: It was once believed sperm contained miniature people that grew in to full sized humans