› added 6 years ago

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TIL that 99.75% of paper cups aren't recycled since it requires special facilities to separate the paper from the hydrophobic coating and the drink contamination

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G4G TIL the U.S. government has specifications for its pens used by personnel: The pen consists of seven different parts and meets 16 pages of military specs, including that it be able to write for a mile with no fading and withstand temperatures up to 160 degrees and down to 40 degrees below zero.
4jwJ TIL Gauss personal diaries indicate that he had made several important math discoveries years/decades before his contemporaries published them. Math Historian Temple Bell said that if Gauss had published all of his discoveries in a timely manner, he would have advanced mathematics by 50 years.
yQ7D8 TIL violence spreads through communities in a pattern similar to infectious disease, and interrupting its spread at critical points has lead to dramatic reductions in killings in crime-plagued areas.
kJkg4 TIL that people born blind have reported being able to see during NDE (near death experiences)
VMoKB TIL there is a supermassive void in space called the Boötes void and if the Milky Way had been in the center of the void, we wouldn't have known there were other galaxies until the 1960s. The void is 0.27% the width of the entire observable universe.