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TIL After Col. Shaw died in battle, Confederates buried him in a mass grave as an insult for leading black soldiers. Union troops tried to recover his body, but his father sent a letter saying "We would not have his body removed from where it lies surrounded by his brave and devoted soldiers."

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660J TIL there are things called metamaterials that are artificially engineered materials with properties not found in nature. These properties are the result of their precisely designed structure. Some have the ability to reverse the refractive index, allowing for the possibility of superlenses.
rRbP4 TIL 'Turn On' (1969) was the shortest lived show in TV history, being yanked off the air by some affiliates before it even returned from the first commercial break in the first episode. The creators were paid to never air it again.
OoKJe TIL NASA renamed sizes or early condom-based toilets from S, M, and L into "large, gigantic and humongous" because male astronauts' ego would make them grab L, regardless of the real size.
1al7W TIL that every year, every Finnish citizen’s taxable income is made public to provide transparency in society and resist economic inequality.
59nr TIL goats have rectangular pupils which allow them to see 320 to 340 degrees around them