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President Franklin D. Roosevelt used the map to justify the United States entering World War II—but as one historian told Mental Floss, “was a fiction forged by the British intelligence service.”

This ranking breaks down how stress varies across the U.S.—with big differences between regions.

They hurl thunderbolts, throw wild parties, and mess with the lives of mortals. Can you match each description to the correct god or goddess?

The earliest Swiss Army knives weren't from Switzerland at all.

Ever wondered why prom-goers wear corsages and boutonnieres? Learn the fascinating history behind these floral trends and their evolution through time.

Geraldo Rivera promised to dig deep in Al Capone’s hotel hideout on Chicago’s South Side back in 1986—here’s the oral history of how it all really went down.

All five answers to the questions below have something in common. Can you figure it out?

Think you're a ‘Princess Bride’ super fan? Discover more fun facts about the 1987 classic, like which actor did a guest lecture at Oxford University in between filming, and so much more.

From gorgeous parks to amazing restaurants, these U.S. cities can offer exciting summer getaways without breaking the bank.

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.

You’ve almost definitely seen 'Jaws,' but these little details and hidden Easter eggs will give you a whole new way to look at the Steven Spielberg classic.

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.