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TIL from 1939 to 1972, the United States Public Health Service conducted a number of tests regarding the impact of untreated syphilis in unknowing subjects. The revelation of this led to the passing of the National Research Act, requiring informed consent from human participants in medical studies.

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neX5G Til that Harvard student and seminarian Jonathan Daniels traveled to the south to aid the civil rights movement. He was walking with a black girl when a deputy pointed his shotgun at her. Daniels jumped in front of her, sacrificing his life so that she could live.
xxj0 TIL that ‘Mad Men’ understated its depiction of drinking, smoking, and sex in 1960s Manhattan. Advertising veteran Jerry Della Femina said that “Three-martini lunches were the norm … The only thing that saved us was that the clients and agencies that we were going back to drank as much as we did”.
xpjb TIL In the Slavery Abolition Act of 1833, Britain had to use one third of its entire national budget to buy all the slaves so that they could be freed.
5VxDp TIL that the conical hood is called a Capirote that is originally used by Catholic Penitants dating its use as far back to the Inquisition times before it was appropriated by a certain Wizard Klub. It is still being used today by penitants in parts of Spain Mexico and Guatemala during Holy Week.
awbpL TIL time flows faster at the surface of the earth than it does in the core.