Mental Floss

BIG QUESTIONS





Postage stamps don't expire, but you also can't use some of them forever.

Can you really use that book of Elvis stamps you grabbed back in the 1990s? Yes, but there's a catch.

Jake Rossen


Heat waves are tough to endure.

The conditions for stifling heat are pretty easy to explain, and so is the solution: Keep cool.

Jake Rossen














Ughhh

Is it really not the heat, but the humidity? With temperatures spiking around the world, it's a good time to answer some questions about the heat index.

Ethan Trex




Norma McCorvey and lawyer Gloria Allred attend a rally outside the U.S. Supreme Court Building in 1989.

The woman known as "Jane Roe" left an enormous mark on the nation’s political landscape—one that’s still at the fore a half-century later.

Kristin Hunt