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A single atom is visible to the naked eye in this stunning photo.

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GAXRj TIL Sloths can hold their breath up to 40-minutes underwater; Dolphins can hold it for only 20 minutes.
6E8Vl TIL that in the Antebellum South, slaves dreaded January 1 -- A.K.A. "Heartbreak Day" -- because New Year's Day was traditionally when debts were settled, resulting in black families being torn apart as slave owners sold or rented slaves out long-term to pay back those they owed money to.
Y7evB TIL that the majority of the time, the “Catfish” is the one who initially contacts the hit TV show MTVs Catfish
J15av TIL Boston experienced a bomb scare in 2007 triggered by LED ads featuring cartoon characters from Aqua Teen Hunger Force. The devices were mistaken for bombs & the response cost an estimated $2M.
YpEJv TIL of Arboform, a "liquid wood" that feels and biodegrades like wood but can be cast like plastic.