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TIL there are still people alive today who had a grandparent born in the 1700s

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5pXk TIL of the Eulachon, a fish so oily that it can be set on fire and was used as a light by Nisga'a people.
V5J4 TIL there is an optical microscope which is assembled from a single piece of paper and a lens, costing less than $1 to build. It can magnify up to 2000 times and weighs 8 grams.
4Xyo TIL that there are planets without stars, that they could outnumber the stars in the galaxy, and could easily harbor bacterial life.
9wlgM TIL Copyleft is a thing
OG647 TIL about Don Black, a white supremacist, member of the American Nazi Party, Grand Wizard of the KKK and founder of the neo-nazi, Holocaust denial, homophobic website Stormfront; he was arrested by the ATF in 1981 while attempting a naval invasion and armed overthrow of the government of Dominica