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Could Cockroaches Really Survive a Nuclear War?

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Some say the world will end in fire, some say in ice; still others say in a nuclear apocalypse that will annihilate humanity while leaving cockroaches intact. It’s an unhappy picture, homo sapiens being completely wiped out by its own technology as the little pests inherit the Earth, but is the possibility fact, or just science fiction?

Unfortunately, it looks like the bugs win this one. They’ve already survived one nuclear attack: The cockroach survival theory surfaced in the wake of the 1945 atomic bombings at Hiroshima and Nagasaki, when reports began to circulate that the only signs of life remaining between the two cities were cockroaches scurrying among the ruins. With that kind of evidence, it’s reasonable enough to infer that even more nuclear weapons won’t be enough to keep them down, but it always helps to test a hypothesis. As usual, that’s where the Mythbusters stepped in

The Discovery Channel team conducted an experiment on German cockroaches to see just how much radiation they can stand before kicking the tiny bucket, and it’s a lot—more than we frail humans can handle, for sure. A month after their initial exposure to 1000 radon units (rads) of cobalt 60—an amount sufficient to kill a human in just 10 minutes of exposure—about half of the cockroach sample was still alive and thriving, which is all the more impressive considering the normal mortality rate of insects with only a 6-to-9-month life span. The second condition upped the dose of radiation to 10,000 rads, about the equivalent amount of exposure that would result from an atomic bomb, and 10 percent of the cockroaches were still around to tell the tale a month later. The 100,000 rads condition, thankfully, proved that at least cockroaches aren’t invincible: None of them made it through, which would be more tragic if they didn’t still possess superhuman levels of radiation immunity.

Detractors from the theory that roaches will someday rule the Earth don’t disagree with the findings that the little creepy-crawlies would easily outlive us after nuclear fallout; their argument is that there are other, even more radiation-resistant insects out there. Wood-boring insects, as well as their eggs, can survive exposure to as much as 68,000 rads, while it would take about 64,000 to take out the common fruit fly. The Habrobracon, a type of parasitic wasp, easily takes the radiation-resistance championship with its ability to survive up to 180,000 rads—somewhere around 200 times as much resistance as any human possesses.

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Big Questions
What Are Curlers Yelling About?
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WANG ZHAO/AFP/Getty Images

Curling is a sport that prides itself on civility—in fact, one of its key tenets is known as the “Spirit of Curling,” a term that illustrates the respect that the athletes have for both their own teammates and their opponents. But if you’re one of the millions of people who get absorbed by the sport once every four years, you probably noticed one quirk that is decidedly uncivilized: the yelling.

Watch any curling match and you’ll hear skips—or captains—on both sides barking and shouting as the 42-pound stone rumbles down the ice. This isn’t trash talk; it’s strategy. And, of course, curlers have their own jargon, so while their screams won’t make a whole lot of sense to the uninitiated, they could decide whether or not a team will have a spot on the podium once these Olympics are over.

For instance, when you hear a skip shouting “Whoa!” it means he or she needs their teammates to stop sweeping. Shouting “Hard!” means the others need to start sweeping faster. If that’s still not getting the job done, yelling “Hurry hard!” will likely drive the point home: pick up the intensity and sweep with downward pressure. A "Clean!" yell means put a brush on the ice but apply no pressure. This will clear the ice so the stone can glide more easily.

There's no regulation for the shouts, though—curler Erika Brown says she shouts “Right off!” and “Whoa!” to get her teammates to stop sweeping. And when it's time for the team to start sweeping, you might hear "Yes!" or "Sweep!" or "Get on it!" The actual terminology isn't as important as how the phrase is shouted. Curling is a sport predicated on feel, and it’s often the volume and urgency in the skip’s voice (and what shade of red they’re turning) that’s the most important aspect of the shouting.

If you need any more reason to make curling your favorite winter sport, once all that yelling is over and a winner is declared, it's not uncommon for both teams to go out for a round of drinks afterwards (with the winners picking up the tab, obviously). Find out how you can pick up a brush and learn the ins and outs of curling with our beginner's guide.

Have you got a Big Question you'd like us to answer? If so, let us know by emailing us at bigquestions@mentalfloss.com.

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Why You Should Never Take Your Shoes Off On an Airplane
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What should be worn during takeoff?

Tony Luna:

If you are a frequent flyer, you may often notice that some passengers like to kick off their shoes the moment they've settled down into their seats.

As an ex-flight attendant, I'm here to tell you that it is a dangerous thing to do. Why?

Besides stinking up the whole cabin, footwear is essential during an airplane emergency, even though it is not part of the flight safety information.

During an emergency, all sorts of debris and unpleasant ground surfaces will block your way toward the exit, as well as outside the aircraft. If your feet aren't properly covered, you'll have a hard time making your way to safety.

Imagine destroying your bare feet as you run down the aisle covered with broken glass, fires, and metal shards. Kind of like John McClane in Die Hard, but worse. Ouch!

Bruce Willis stars in 'Die Hard' (1988)
20th Century Fox Home Entertainment

A mere couple of seconds delay during an emergency evacuation can be a matter of life and death, especially in an enclosed environment. Not to mention the entire aircraft will likely be engulfed in panic and chaos.

So, the next time you go on a plane trip, please keep your shoes on during takeoff, even if it is uncomfortable.

You can slip on a pair of bathroom slippers if you really need to let your toes breathe. They're pretty useless in a real emergency evacuation, but at least they're better than going barefoot.

This post originally appeared on Quora. Click here to view.

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