HowStuffWorks_Culture

Did you see Donnie Darko? What was up with that "cellar door" thing?

It was ghastly to see your grandmother's hair had grown that time the county exhumed her, but you can feel better because it didn't really.

They are creepy, sure, but they are also useful, cute and in great danger of extinction. So how do bat wings differ from bird wings? Let Josh and Chuck fill your brain with batty knowledge in the animated clip from Stuff You Should Know.

The day after Daylight Saving Time begins is an important day for napping, especially since it's National Napping Day. It's also Middle Name Pride Day and - perhaps most important of all - Chuck Norris' Birthday.

We've all heard the story about our country's first President chopping down a cherry tree as a wee child. But did it really happen? Josh sets you straight.

Have you ever heard that we humans only use 10% of our brain? Well the person who told you that was using 0% of theirs.

Have you ever forgotten what you were doing? Especially when walking from one room to another? It turns out there might be an explanation for that.

Did you see Donnie Darko? What was up with that "cellar door" thing?

You know how when someone has a seizure you're supposed to put something in their mouth to keep them from swallowing their tongue? Don't do that.

You know how some people keep their batteries in the freezer to make them last longer? Those people are insane and you should run from their house when you get the first chance.

You know how when someone is murdered in a house the realtor has to tell you all about it? They might not, after all! Your couch could be on top of a bloodstain and you'd never know. Here's why.

You love honey. You eat it all the time, honey lover. But what you're eating is bee vomit. How's your precious honey taste now?

There was once a chicken who survived his head being cut clean off and lived anouther year and a half, gaining six pounds and dying in a hotel room because he choked to death. It's all true and Josh spreads the Gospel of Mike in this video.

Have you ever put your finger in a tiny baby's hand and been terrified when it started grasping it? The explanation probably lies in our evolutionary past. Josh explains.

Have you ever wondered where all the fireflies have gone? Turns out there are several theories. Let Josh set you straight.

Have you ever heard that urine is sterile? Consider the possibility that the person who told you that really just wanted to pee on you. Josh sets you straight.

Have you ever gazed up into the night sky and wondered whether there are more grains of sand on Earth or stars in the universe? Well get back inside and watch this video.

Have you ever been relaxing in the bath and then looked at your fingers and shrieked in terror? Calm down and watch this video.

If you've made it to your early 20s, you've probably had a tooth problem, meaning that you got more coming in. That's because you haven't evolved all the way yet, man.

You might look fondly upon cuckoo birds because of the cute clocks, but it turns out they're actually kind of jerks. Josh explains.

You've probably heard that you can count the seconds between seeing a lightning strike and hearing thunder to figure out how far away it is. That's pretty much true, and here's why.

Have you ever heard that if a statue of a person on a horse has the horse standing a certain way you can tell if the person the statue's made to represent died in battle? That's not true.

You know those signs that say your speed is monitored by aircraft? Are those liar signs? Find out in this episode of Don't Be Dumb.

Some scientists feel like a lack of biodiversity could be the planet's most daunting issue in the future. When species become extinct, it sets off a chain reaction affecting the entire ecosystem. Learn about the biodiversity issues facing our planet.

Has some old man ever told you that you can tell the temperature by counting crickets' chirps? That old man was right!