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How To: Get Detained By Airport Security

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Dangerous Item: Comedians
Don't Bring "˜Em To: Myanmar
The citizens of this country just want to avoid trouble—the kind that starts with a capital "T" and that rhymes with "C" and that stands for "comedy." Once known as Burma, Myanmar has a long tradition of stand-up comedy, usually in conjunction with traditional dance and theatre. But, since the rise of the military government nearly 20 years ago, comedy and comedians are increasingly unwelcome because of their propensity to make jokes at the junta's expense. Jokesters have even spent time in jail. Two members of an act known as the Moustache Brothers were imprisoned, with hard labor, for five years after they cracked some anti-regime jokes at a 1996 rally. A letter campaign by American comedians eventually got the two freed in 2001, but they're now banned from performing their act in Burmese.

Dangerous Item: Camera Phones
Don't Bring "˜Em To: Saudi Arabia
These trendy little devices were banned in 2002 amid concerns that the tiny cameras were being used to secretly photograph women in family or all-female environments where they might not be dressed as modestly as they would in public. In fact, according to news reports, accusations of camera phone use had led to fights at weddings and pat-down searches of students at girls' schools. But, after the ban incited a massive black-market business, the phones were re-legalized in 2004.

Dangerous Item: Vegemite
Don't Bring It To: The United States
In 2006, rumors (fueled by breathless reports by the Australian and New Zealand press) began circulating that the United States had banned the yeast-based, salty spread Vegemite from its shores. Popular (for some strange reason) with folks from down under, the spread contains large quantities of folate, a chemical whose artificial form, folic acid, is tightly regulated by the FDA. Natural folate doesn't fall under the laws, so Vegemite isn't actually in danger of bannination, but the FDA does limit the types and amount of products that can contain folic acid. Why? Because while small amounts of folate are important (particularly for fetuses and pregnant women) nobody knows what side effects it could produce if you were to start eating it in larger doses.

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science
Why a Howling Wind Sounds So Spooky, According to Science
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Halloween is swiftly approaching, meaning you'll likely soon hear creepy soundtracks—replete with screams, clanking chains, and howling winds—blaring from haunted houses and home displays. While the sound of human suffering is frightful for obvious reasons, what is it, exactly, about a brisk fall gust that sends shivers up our spines? In horror movie scenes and ghost stories, these spooky gales are always presented as blowing through dead trees. Do bare branches actually make the natural wailing noises louder, or is this detail added simply for atmospheric purposes?

As the SciShow's Hank Green explains in the video below, wind howls because it curves around obstacles like trees or buildings. When fast-moving air goes around, say, a tree, it splits up as it whips past, before coming back together on the other side. Due to factors such as natural randomness, air speed, and the tree's surface, one side's wind is going to be slightly stronger when the two currents rejoin, pushing the other side's gust out of the way. The two continue to interact back-and-forth in what could be likened to an invisible wrestling match, as high-pressure airwaves and whirlpools mix together and vibrate the air. If the wind is fast enough, this phenomenon will produce the eerie noise we've all come to recognize in horror films.

Leafy trees "will absorb some of the vibrations in the air and dull the sound, but without leaves—like if it's the middle of the winter or the entire forest is dead—the howling will travel a lot farther," Green explains. That's why a dead forest on a windy night sounds so much like the undead.

Learn more by watching SciShow's video below.

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Space
SpaceX's Landing Blooper Reel Shows That Even Rocket Scientists Make Mistakes
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SpaceX's Falcon 9 rocket launches.
AFP/Stringer/Getty Images

On March 30, 2017, SpaceX did something no space program had done before: They relaunched an orbital class rocket from Earth that had successfully achieved lift-off just a year earlier. It wasn't the first time Elon Musk's company broke new ground: In December 2015, it nailed the landing on a reusable rocket—the first time that had been done—and five months later landed a rocket on a droneship in the middle of the ocean, which was also unprecedented. These feats marked significant moments in the history of space travel, but they were just a few of the steps in the long, messy journey to achieve them. In SpaceX's new blooper reel, spotted by Ars Technica, you can see just some of the many failures the company has had along the way.

The video demonstrates that failure is an important part of the scientific process. Of course when the science you're working in deals with launching and landing rockets, failure can be a lot more dramatic than it is in a lab. SpaceX has filmed their rockets blowing up in the air, disintegrating in the ocean, and smashing against landing pads, often because of something small like a radar glitch or lack of propellant.

While explosions—or "rapid unscheduled disassemblies," as the video calls them—are never ideal, some are preferable to others. The Falcon 9 explosion that shook buildings for miles last year, for instance, ended up destroying the $200 million Facebook satellite onboard. But even costly hiccups such as that one are important to future successes. As Musk once said, "If things are not failing, you are not innovating enough."

You can watch the fiery compilation below.

[h/t Ars Technica]

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