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TIL that modern violins were preferred over million-dollar Stradivarius violins when the sound tests were blind

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DNdg TIL Scotch tape has an unusual property. When placed in a vacuum chamber, unpeeling a length of tape from the roll will produce an enormous amount of X-ray radiation. The reason why it does this isn’t well understood.
BdNd TIL that there is a “three generations of punishment” sentence in North Korea. This means a person would be sent to the camp along with that person’s entire family and two subsequent generations of family members would be born in prison and live their entire lives there.
6E7aY TIL Nicholas Culpeper, a 17th century physician married to wealthy heiress, enabling him to provide services free of charge while translating Latin medical text into English then sold them very cheaply for the poor who can't afford expensive physicians
vg1x TIL experiments were held that tested responses to potential threats from white and black strangers. The results determined that unarmed blacks were shot more than whites, even among black subjects tested. “The trend is less likely a function of active prejudice than of ambient social stereotypes.”
4Xplo TIL that crows can hold grudges and are even known to pass it on to its chicks.