Mental Floss

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in H.T. Opsahl's classroom, bad kids faced serious repercussions.

In 1924, H.T. Opsahl sentenced disruptive kids to a high-voltage electric chair. Parents were not amused. Discover more about the origins of one of history's worst high school teachers here.

Jake Rossen
















It wasn’t one of Adams’s finest moments.

When John Adams penned a letter to future first lady Abigail Adams on July 3, 1776, he guessed how future generations of Americans would celebrate Independence Day with remarkable accuracy—but he got the date wrong.

Erik van Rheenen








Sorbet or Italian ice? You be the judge.

Italian ice has a sorbet-like texture, but these frozen desserts really aren’t the same thing. So, where does this summer treat really come from—and more importantly, is it even from Italy in the first place?

Marla Mackoul