Bet you didn’t know this: In ancient Rome, gladiators were so admired that their sweat was collected, bottled and sold as an aphrodisiac, and some women even used it in their beauty products.

Or this: a U.S. nickel weighs approximately 5 grams, the same weight as the average hummingbird.

Featuring hundreds of short facts written and curated by the HISTORY team, the Bet You Didn't Know app offers a fun and unique look at human civilization. Users can explore facts by theme, create collections of favorites and share facts with friends. The app also offers access to exclusive video from the original HISTORY short video series "Bet You Didn't Know."

Whether you're looking to impress your friends, find out something new or just amuse yourself, the app is an exciting way to discover all kinds of things we bet you didn't know.

App Features:
- Explore facts by theme and popularity or simply browse facts at random.
- Watch exclusive video from the HISTORY "Bet You Didn't Know" short series
- Share facts and quiz your friends over Facebook, Twitter, email or text.
- Create a collection of your favorite facts
- View facts by popularity
- View only new or unread facts
- Browse facts while offline