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TIL the largest explosion ever observed in the universe was from a supermassive black hole in galaxy cluster MS 0735.6+7421, releasing more energy than hundreds of millions of supernovae combined

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via reddit.com

ADQ6d TIL that the main function of the little hole in the pen cap is to prevent deaths by suffocation in case someone swallows the pen cap by mistake; saving hundreds of lives a year.
8e4Ea TIL Ozzy had 6 children.
mxMaR TIL Comedian writer Billy Domineau wrote a spec script for Seinfeld called "The Twin Towers" that is set in the days following 9/11
MWa TIL Canada is eliminating the penny, and has a collectible glow in the dark quarter with a dinosaur on it!
D1NeD TIL that Johnson & Johnson is a holding company for 250 separate, subsidiary businesses