Mental Floss

BIG QUESTIONS

When life gives you lemons, return to the dealership.

Cars aren’t a piece of fruit, so how did they come to be associated with lemons? Discover how this slang term got adopted in the automotive world and what it really means.

Jake Rossen


The lore behind America's favorite ballpark snack is pretty fascinating.

Discover the curious origins of America’s favorite ballpark snack and why it’s called a “hot dog” to begin with. (Spoiler: It doesn’t involve any literal dog meat.)

Lauren Dana


The dish really doesn't have anything to do with primates.

Monkey bread—a sticky pull-apart pastry that’s typically made from canned biscuit dough—is a sugary, cinnamony treat that has nothing to do with primates.

Sam Hindman




This scene probably wouldn’t be enough to claim ownership of the moon in space court.

The question of who has a claim to the moon and its resources is less a speculative fiction subject and more one for lawyers. Specifically, space lawyers.

Jake Rossen


You might not want to eat a hot dog after reading this.

You’ve probably wondered what’s really inside a hot dog before. We have the answer—though we don’t recommend reading it before your next cook-out.

Jake Rossen






The Dakotas didn't get along.

If the colony of Carolina and the Dakota Territory hadn’t decided to split themselves up, we’d have only 48 states right now. But why did these particular places become geographic variants of each other?

Leah Beckmann




There's a legitimate reason, and it isn't purely aesthetic.

Natural rubber is white, and so were the earliest car tires. So, why are modern-day tires black? The answer is linked to Crayola and carbon black.

Jake Rossen


The bow of the USS ‘Samuel B. Roberts,’ lying more than 4 miles under the surface of the Pacific Ocean.

These are the five deepest shipwrecks ever discovered, including the USS ‘Samuel B. Roberts,’ which went to the depths of the Philippine Trench during the Second World War.

Tim Brinkhof


“Say uncle!”

One theory says it comes from an Irish word; another says we have the ancient Romans to thank. But the joke is on those theories, because the real story is more complicated than that.

Kara Kovalchik, Erin McCarthy