› added 2 years ago

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TIL people didn’t know TNT was explosive for 28 years and used it as yellow dye instead

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via reddit.com

9YVGM TIL that if a cat headbutts you the cat is marking you with their scent and headbutting is typically used for bonding and social purposes.
5dJn TIL scientists created a computer memory crystal that can store 360 TB of data/disc and last approx. a million years by using pure silica and storing the data in 5 dimensions
kEKm TIL Apollo Mission astronauts have nearly five times higher mortality from cardiovascular disease than other astronauts due to exposure to deep-space radiation.
9YkG6 TIL that there is a Gary Gygax memorial where people ask to have their dice blessed by the spirit of the man who created D&D
LjV TIL that Earth has a quasi-satellite, incorrectly called Earth’s second moon, that orbits the sun every 364 days.