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May 21, 1980 saw the release of what has now come to be regarded as the best film in the Star Wars series, "The Empire Strikes Back." Learn about its production in today's episode of This Day in History.

In this episode, Josh and Chuck fill you in on the history of the beloved (or perhaps dreaded) tradition known as the chicken dance. Don't be a stick in the mud, come on and do the chicken dance!

In this new weekly series, Josh and Chuck offer a unique look at this day in history. In the first episode, we note the birth of Giacomo Girolamo Casanova, 18th century Italian adventurer and legendary ladies man. Plus, what are Josh and Chuck up to?

In this new weekly series, Josh sets you straight on misconceptions both common and esoteric. In this episode, Josh debunks the popular belief that lemmings are suicidal by nature. Join us, won't you?

In this episode, Josh explains why cracking your knuckles isn't literally cracking your knuckles. Along the way, we learn about a doctor who spent over 60 years cracking his knuckles to disprove this popular myth.

There's a word that looks like it's pronounced "yee," but doesn't really exist. No, you're just falling for an old trick of Olde English - the now-defunct letter, the thorn. So get with it and stop sounding like a reject from the Renaissance Fair.

Can you actually die of boredom? Maybe not literally, but studies have shown boredom often leads to risky and unhealthy behaviors. Find out more about how to deal with boredom in this week's Trapped in a Meeting.

Sada Abe is a notorious figure in Japanese history, known for her shocking acts which included everything from murder to castration and even necrophilia. Tune in to find out more about this infamous case.

Have you heard that you should drink eight glasses of water a day to stay healthy? Of course you have. But is it true? Tune in to this episode of Don't Be Dumb to find out if this common claim holds water.

A wave of child murders swept over Denmark in the 18th century - but why did it happen? The answer, and the logic behind it, may surprise you. Get comfy, it's another installment of Trapped in a Meeting.

Iridescence is in everything from soap bubbles to butterfly wings, but what exactly is it? Join the guys as they unravel the mysteries of iridescence.

There are plenty of urban myths about laws that make you help out other people and most of them are dumb lies. But at least one is correct in some places: restroom access laws. Join Josh Clark as he lays down the law in this episode of Don't Be Dumb.

Have you ever wondered why cutting into an onion can make you cry? You are about to know.

In movies and stories, zombies are undead menaces that lurch around mindlessly, in search of flesh. Join Josh and Chuck from Stuff You Should Know as they investigate if zombies exist outside of fiction.

If you think that the Northern Lights are a light show from some crazy wizard who lives in an ice cave in the North Pole then you'd better watch this and learn what's what.

Built by CERN, the Large Hadron Collider is supposed to search for the elusive Higgs boson -- but why? Tune in as Josh and Chuck catch you up to speed on the Higgs boson in this exclusive video from HowStuffWorks.com and the Science Channel.

In this week's special shark-themed episode, we look at a series of shark attacks that occurred along the Jersey Shore back in 1916. The attacks are widely believed to have been the inspiration for the novel and subsequent mega-blockbuster film Jaws.

Do you have a certain way you like to fold your arms? Does it feel wrong when you try to do it differently? You're not alone: most people have an arm-folding preference. But, contrary to what some say, this is not genetic. Find out why.

In the future, Mars could be a downright homey place for new generations of human beings -- but there's a catch. We'll have to build an atmosphere first. Join Josh and Chuck as they explore the future of terraforming.

On August 20th, 1866, President Andrew Johnson - not Abraham Lincoln - formally declared the end of the American Civil War. Join Josh and Chuck for the story of how it all happened.

Have you ever eaten something cold and gotten a headache? Informally, this is known as brainfreeze, but officially it's sphenopalatine ganglioneuralgia. Lucky for you, there's a quick remedy. Tune in to find out how!

Continuing our special lead-up to Shark Week, today we look at the single worst tragedy in U.S. naval history, the sinking of the U.S.S. Indianapolis in 1945. The men who survived the sinking were left defenseless against shark attacks in the ocean.

In this episode, Josh explains how when you're eating a banana, you're actually eating the product of cloning! Don't Be Dumb - watch the video to find out why.

It's true: someone really has made an invisibility cloak. So how does it work? Listen in as Josh and Chuck explain the nuts and bolts of a real-life invisibility cloak.

Heterochromia iridum is a medical condition in which the eyes are different colors. This week on Trapped in a Meeting, find out how melanin (or the lack thereof) causes this condition.