LiveScience.com has a list of the 20 Most Popular Myths in Science. Included in the list are classics such as these:

It takes seven years to digest gum.
Hair and fingernails continue growing after death.
A penny dropped from the top of a tall building could kill a pedestrian.
Humans use only 10 percent of their brains.
You get less wet by running in the rain.
Eating a poppy seed bagel mimics opium use.

Oddly enough, they also throw a few strange-but-true items into this list of myths, such as these:

Chickens can live without a head.
Yawning is "contagious".

The Comics Should Be Good blog is creating a database of comic book urban legends. I don't recognize all the names and characters referred to, but it makes for interesting reading anyway. Here's a few samples (full explanations for all of these at Comics Should Be Good):

Wolverine's costume was patterned in part on the uniforms of the Michigan Wolverines football team. (False)

Joker was originally killed off in his SECOND appearance! (True)

Wolverine was initially intended to be a genetically mutated wolverine. (True)

Wonder Woman creator William Moulton Marston invented the polygraph test! (False)

Marvel Comics licenses the use of the name "Hulk" to Hulk Hogan. (False, now... but it used to be true)

Marvel HAS to publish a Captain Marvel comic book. (For all intents and purposes, True)

DC had a Superman storyline set during the Holocaust that did not mention the word "Jew" or "Jewish." (True)

Nicolas Cage took his last name from Luke Cage, Hero For Hire. (True, depending on when you talk to Nicolas Cage)

There's an old urban legend that states that the makers of lip balm (Carmex, specifically), add ground-up fiberglass to their product. The glass irritates people's lips, causing them to feel like they need to apply the balm again and again. There's another urban legend that states that lip balm interferes with the moisture sensors in the lips, causing lips to become dry and requiring more lip balm to be applied. Neither of these urban legends is true. Carmex debunks the fiberglass myth on their website, and the moisture sensor one is false because there are no such thing as moisture sensors in the lips. (At least, not ones that regulate the moisture levels of the lips.)

However, an Associated Press article points out that many lip balms contain salicylic acid or other irritants, and that these additives could encourage repeated use, thereby lending some substance to the charge that lip balm is physically addictive:

Dr. Monte Meltzer is the chief of dermatology at Union Memorial Hospital in Baltimore. He says lip balm often includes ingredients that cause a tingling, such as salicylic acid, phenol and menthol. Some of these are exfoliants that cause lips to peel. In turn, the lips become thinner and less able to protect against the elements. So people need to apply again, and the vicious cycle continues.

Carmex, in its defense, tries to make out as if salicylic acid is a mild, non-irritating chemical, pointing out that it's "closely related to aspirin." However, I don't see why its relationship to aspirin is relevant since salicylic acid obviously does dry out your skin (which is why it's used in acne medicine).

However, even if lip balm isn't physically addictive, I know that it's definitely psychologically addictive, because my wife is totally addicted to the stuff. (I try to tell her that if her lips feel dry, she should drink more water, but she doesn't listen.) For those who are hooked on the stuff, Lip Balm Anonymous can offer some help.

The Auburn Plainsman (student paper of Auburn University) has a short article about campus urban legends. The ones they list are:

Endowment from old lady bans sorority houses: This UL seems to exist on every college campus that doesn't have sorority houses. It states that some rich old woman left a large sum of money to the college on the condition that they ban sorority houses, because she considered them to be brothels. The more likely reality, among those schools that have sororities but no sorority houses, is that women used to be required to live on campus. Once that rule was lifted, it was cheaper for sorority members to live on campus in dorms, so the houses were never built.

If you get hit by a campus bus the school will give you free tuition: Unlikely, but if you're lucky, maybe an insurance payout would cover the cost of tuition.

Students whose roommates commit suicide receive automatic straight A’s: A guy in my college class committed suicide. His roommate didn't get automatic straight A's. I don't think anyone ever has.

"Beer before liquor, never sicker. Liquor before beer, in the clear": Repeated at every campus party, though it has no basis in fact. The corollary to this UL is that if you sip beer through a straw, you'll get drunk quicker. This one I'm not sure about.

And a few that they left out:

The Sinking library: every campus has a library that's supposedly sinking, because the engineer who designed it forgot to include the weight of the books.

The ten-minute rule: If the professor hasn't shown up in the classroom within ten minutes of the start of the class, everyone gets to leave. I don't think this is official policy anywhere.

Last year there was some discussion on the site about the gender of Santa's reindeer. The theory (as stated in an email that was doing the rounds) is that Santa's reindeer all have to be female because male reindeer drop their antlers at the beginning of winter, whereas female reindeer retain their antlers until the spring. Big Gary, who's wintering in Alaska, has sent along this photo of "a bull reindeer in Fairbanks, Alaska, this Wednesday, December 21, 2005," which pretty much settles the question of whether male reindeers can have their antlers in late December, around Christmas time. They obviously can. So Santa's reindeer could be male or female. Thanks, Gary.

This has already been posted in the hoax forum, but it's too good to ignore. Reuters has reported on a Mexican urban legend concerning a mannequin in the window of a bridal gown store in the city of Chihuahua. Local rumor has it that the mannequin is really the embalmed body of the former store owner's daughter. The former store owner was called Pascuala Esparza. La Pascualita means 'Little Pascuala' (i.e. her daughter). According to the legend her daughter died from the bite of a Black Widow spider on her wedding day, so Pascuala embalmed her and stood her up in the window of the store. It definitely is an urban legend because it would be impossible to embalm someone and have their flesh be preserved that perfectly. For some reason, people tend to think that it's easier to preserve a body than it actually is. For instance, there's also the urban legend about a dead wife used as a coffee table, in which a guy seals his dead wife inside an airtight glass coffin which he uses as a coffee table. In real life, it's not that easy to preserve a corpse.

The blog of Mari Kanazawa has an interesting post about Japanese urban legends. Here are some of the highlights:

Turbo Gramma: When you drive on the highway at a blistering speed gramma knocks on the car window. If you see her, you will have a car accident. Someone made a turbo gramma game.

Touch the Red G-String: The delivery company trade mark of Sagawa is "Hikyaku", a traditional Japanese postman. Hikyaku wore a traditional red Japanese g-string Fundoshi! The legend was 'if you touch a red g-string on a sagawa truck, you will have good fortune, if you could touch it on a moving truck, the fortune would be bigger, and faster was better.' As far as I checked this story on the internet, many people wrote that they had tried touching it. I heard sagawa had to change their trade mark red g-string to red pants. ha ha ha

The Skylark Bellybutton: Skylark is a chain restaurant that we can find anywhere in Japan. The trade mark of the restaurant is a bird that has a bellybutton. The legend is if you can find one without a bellybutton, you can eat food free in the restaurant.

Hanako san in Toilet: There were many variation of the story but the basic one is very simple. It happens in a toilet at school: You knock three times on the toilet door, and say "Hanako san?" and you can hear someone reply "ha----i" quietly somewhere from empty toilet room. Because of this Hanako san boom, many kids could not go to toilet alone in those days. This Hanako san story was arranged and made into 4 movies.

I know a lot of people who swear by the notion that you have to sear meat "to seal in its juices." But I've always thought the idea was a bit far-fetched (though I agree that meat is best cooked hot and fast), so it pleased me to read, in a review of Alan Davidson's Oxford Companion to Food, that most food experts agree that it is indeed an urban legend that searing meat will seal in its juices. About.com's barbeque expert agrees:

By definition, searing is to cook something hot and fast to brown the surface and to seal in the juices. Yet many of the leading cooking experts agree that searing does not seal in juices. Frankly the idea that you can somehow melt the surface of the meat into a material that holds in all the juices seems a little strange to me. But whether you believe searing seals in juices or not, a great cut of meat needs hot, dry heat to caramelize or brown the surface to give it that great flavor.

The same review of Davidson's Oxford Companion to Food lists a number of other food myths. For instance:

MSG Causes Headaches (aka Chinese Restaurant Syndrome): "Jeffery Steingarten, food editor of the Vogue in New York, debunked this myth pretty comprehensively. Given the widespread use of MSG in China, he asked why weren’t there a billion Chinese people with headaches? He then went around relentlessly researching the theory in his characteristically thorough way, and came to the conclusion that MSG, taken in normal quantities, was perfectly safe." (I know many people who swear they get headaches after eating MSG, so I'm reluctant to accept this as an urban legend. But some quick research reveals that a controlled study at Harvard University also concluded that MSG in food doesn't cause headaches.)

Croissants were invented during the 1529 Siege of Vienna, when a baker who foiled a Turkish plan to breach the city's walls was rewarded by being given a royal licence to produce crescent-shaped pastries: "Davidson debunks this romantic legend and informs us that in fact, the first reference to croissants did not appear until 1891, more than two centuries after the siege of Vienna."

In the Middle Ages spices were used to mask the flavor of spoiled meat: "Davison cites Gillian Riley to rubbish the notion... Indeed, in pre-refrigeration days, we had assumed that the role of spices and heavy sauces was to conceal the fact that meat had spoiled. Riley makes the valid point that in those days, spices were far too expensive to be used for this purpose."

Chop Suey was invented by a Chinese restaurant in California which threw together odds and ends ('chop suey' in Chinese) as a meal for drunken miners: "according to Anderson, quoted by Davidson, chop suey is a local dish from Toisan, a rural district south of Canton. In Cantonese, its name is tsap seui, meaning 'miscellaneous scraps'."

The recent publication of a novel for teenagers titled RAINBOW PARTY has revived debate about whether or not such 'rainbow parties' are real. As a recent NY Times article explained, "rainbow parties are group oral sex parties in which each girl wears a different shade of lipstick, and each guy tries to emerge sporting every one of the various colors." Such parties are supposedly all the rage with teenagers (kids these days!... what will they think of next?). In the book, a teenage girl has to decide whether or not to go to such a party, but the party ends up never taking place.

The concept of rainbow parties first gained widespread attention back in 2003 when a guest on the Oprah show claimed that all kinds of teenagers were going to these things. But the thing is, tales about rainbow parties always seem to be third-hand: coming from adults who are trying to raise alarms about teenage sexuality. The same NY Times article notes that "Many say rainbow parties are just a new urban legend -- suburban, actually -- not much more trustworthy than the old stories about alligators in the sewer."

I'd have to agree that the rainbow party concept is probably more urban legend than reality. It reminds me of the Jelly Bracelet tale (that teenagers supposedly wear color-coded jelly bracelets to indicate to other kids what kind of sexual acts they're willing to perform). But as always with such things, it may have started out fake, but give it enough time and someone, somewhere, is probably going to be inspired to make it real.

This month, as I'm sure everyone is aware, is the 75th anniversary of the creation of Hostess Twinkies. To mark that anniversary it's worth linking to this article in which a Hostess marketing person tries to debunk that urban legend about how Twinkies last forever. He claims they only last 25 days. Yeah, right:

"We hear that they can survive a nuclear winter. Of course, it’s all urban legend," says Hostess marketing manager Kevin Kaul. But in fact, Interstate Brands Co., Hostess’ parent company, designates a 25-day shelf life for its most famous product. Interstate has 17 bakeries nationwide; they crank out 500 million Twinkies a year.

Was the Nike Swoosh (which is perhaps one of the most famous corporate logos in the world, second only to McDonald's golden arches) really designed by a graphic design student who got paid only $35 for it? It sounds like an urban legend playing off of Nike's use of cheap Asian sweatshop labor. But apparently the story is true. At least, the Nike website confirms it. The swoosh was designed in 1971 by design student Carolyn Davidson, and she did only receive $35 for it. However, in 1983 the company gave her a gift of stock as a token of their appreciation.

Here's an old news story (from Dec. 2003), but it's still interesting from an urban legend perspective. An 18-year-old youth in South Africa claims that three women forced him at gunpoint to have sex with them. "The youth claims that after this the women said welcome to the world of Aids." It seems like the police didn't believe his story. They just laughed at him, which isn't surprising considering that his story is exactly like that urban legend about someone who wakes up after a one-night stand to find the person they slept with has disappeared and written 'Welcome to the world of AIDS' on the bathroom mirror. But just imagine if the kid is telling the truth. No one will ever believe him.