The Eugenics Record Office thought pseudoscience could make more perfect humans. It led to unspeakable tragedy.

Because basements are partially below grade, or under the ground, an egress window is often installed near a window well, which provides space to maneuver once a person has exited through the window.

Boston’s Fenway Park is full of criminals. In the state of Massachusetts, it’s technically illegal to swear at or otherwise insult athletes or officials during sporting events. That would make ...

But of all the English language’s possible sources of difficulty, easily confused and muddled word pairs—from there and their to e.g. and i.e. —surely rank among the most troublesome. Now, a new ...

But it’s a lot harder to remember the village or town where each president was actually born. Let’s see how far you can get in this surprisingly difficult quiz. What about the other states that can ...

With 1985 now 40 years gone, Mental Floss is taking a look at the people who were making headlines and emerging as cultural ...

A science fiction writer called it an “artifact of such utter simplicity and perfection that it seems it must be either the ...

These little spaces often spark curiosity and nostalgia, though few people know their history.

A widow’s peak is a noticeably v-shaped point to the front of a person’s hairline, with the tip of the v typically aligning with the center of their forehead. As many as a third of people have a widow ...

Recently, Mental Floss broke down the state names that Americans find the hardest to pronounce, based on a study by language learning website Preply. As part of ...

First, pour about a half-gallon of water into an aluminum pan. Mix a bit of dish detergent into the water, and slosh it ...

We give you an obscure word with four definitions—one correct, three made up. Can you identify the correct one?