Stop staring at guys' shoes! Dr. Aaron Carroll clears up some common misconceptions about sex.
Start working these into conversation immediately.
One of TIME's 100 Most Influential People discusses the origins of some famous car makes and models.
John Green goes behind the scenes of Teletubbies, Schoolhouse Rock, Yo Gabba Gabba, Blue's Clues and more.
Special guest host Michael Stevens from the insanely popular Vsauce takes a closer look at some common science illustrations.
John Green goes around the country pointing out interesting things about state capitals.
Author and Nerdfighter John Green puts them to the test.
Don’t live anywhere near Times Square but still desperate to see something drop on New Year's Eve? We can help.
Keep these handy for lulls in conversation at this year's holiday party.
John Green wants you to know that pilgrims didn't wear buckled-hats. We hope that doesn't ruin your holiday.
You know the superstitions. Do you know how exactly people came up with them?
If you want to hand out delicious trivia along with the candy this Halloween, watch this video immediately.
This week we're on location at The Field Museum in Chicago, and we have some wonderful and terrifying animals to show you.
Can you start a fire with Doritos? LET'S FIND OUT!
Beat a dead horse? Silver lining? Peeping Tom? John Green looks at the strange origins of 42 common expressions.
A big New York secret is hiding in a freight elevator. Come along on our trip to Museum!
Batman vs. Godzilla? The Beatles in Lord of the Rings? John Green looks at 55 films that never made it to the silver screen.
So that's what you call it!
You know their names and you've eaten their lasting legacies, but who are these people whose names became foods?
Next time you play Super Mario Bros., you'll realize the bushes are just green clouds. You'll know what game could have been called Monkey Nuts. And more!
mentalflossvideo is a member of BuzzFeed Community, where everyone can post awesome lists and creations.