› added 6 years ago

396

TIL about the "Drinkable Book". Not only is it an instruction manual on how to filter water but it also has removable pages that are coated in silver nanoparticles that can be used to filter unclean water itself.

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via reddit.com

wGMY TIL that although the U.S. carpet bombing of Laos and Cambodia killed tens of thousands of people, it was officially denied for over 30 years
PYR9V TIL Phoenix, AZ used to be full of canals built by indigenous peoples
5Veb8 TIL Only 11% of students from low income families earn a bachelors degree by 24
rWYx TIL that in Victorian times testicles were referred to as ‘whirlygigs’, 'bawbles’ and 'twiddle-diddles’
l7JE7 TIL that Nazis built (1941) and later beautified (1944) a model ghetto in Theresienstadt in preparation for a delegation from the International Committee of the Red Cross to give the visitors a positive impression.