Mental Floss

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What is sand, exactly?

Every summer at the beach, sand becomes an essential ingredient in the recipe for fun. But what the heck is it?

Rachel Lense








Whether an entire town can’t stop dancing or people suddenly start worrying about minor marks on their windshields, these seemingly unbelievable events have had some surprising (and sometimes devastating) effects.

Stacy Conradt


Maurice Sendak.

Maurice Sendak's books were shaped by his own childhood: one marked by the Lindbergh baby kidnapping, the concentration camp deaths of most of his extended family, and parents consumed by depression and anger.

Stacy Conradt






Larry Kramer in Manhattan's Washington Square in 2007.

While co-founding two of the most influential HIV/AIDS organizations in the U.S., he still had time to pen a landmark play and be nominated for an Academy Award.

Shannon Leigh O'Neil
A lot of the methods involved pee.

Before home pregnancy tests, the most reliable test was just to wait and see. But people still wanted to know as early as possible whether they were harboring a tiny human.

Linda Rodriguez McRobbie

Whether you enjoy the velvety skin on peaches or peel it off, you may wonder why they developed fuzz in the first place. 

Michele Debczak