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TIL copper is one of the few metals that can occur in nature in a directly usable metallic form, leading it to be perhaps the first metal to be mined and crafted by humans.

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njDW TIL there is a product that will turn you into a tree after death. Gerard Moline developed the Bios Urn which allows people to use their ashes to germinate a seed of their choice.
x0w7 TIL in 2014 a cat saved his young owner from being attacked by bullies. After they teased the boy outside his home and shoved him to the ground, the cat ran out, jumped on the ringleader’s chest and hissed until they fled in panic. The cat then slept outside the boy’s room every night to protect him
W76p8 TIL Pluto was discovered in 1930, and because of its extremely long orbital period (248 earth years), humans will not observe one whole orbit until 2178
nnRB TIL American painter Tyree Callahan converted an old typewriter from the 1930s into a machine that prints colors instead of letters; from this he has typed out a series of colorful landscape paintings
e0Agb TIL that to clean up after using the lavatory, ancient Romans used a "tersorium", a sponge on the end of a long stick that was shared by everyone in the community. When not in use, the stick stayed in a bucket of vinegar or seawater in the communal bathroom.