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Are Cats and Dogs Right or Left Handed, Too?

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According to two studies, the answer is yes: Just like humans are usually right- or left-handed, cats and dogs are typically right pawed or left pawed.

The first study, performed by researchers at Turkey's Ataturk University in 1991, showed the majority of domestic cats are right pawed (50 percent), 10 percent are ambidextrous, and the remaining 40 percent favor their left paw. But dogs, according to a 2006 study by the University of Manchester, tend to be more evenly split—around 50 percent of dogs are left pawed and 50 percent are right pawed, with a statistically insignificant number being ambidextrous.

Determining if your cat or dog is left or right pawed or ambidextrous isn’t as simple as holding a toy just out of reach and seeing which paw they reach with. This is because their paw preference is often weakly expressed, unlike with humans. So in order to accurately determine your pet’s paw preference, you need to run tests several dozen times to see the trends. Just a few tests include: What paw does your dog most often shake with? If your dog or cat is playing on its back and you put your hand just out of their reach, which paw do they reach for your hand with? You can also try putting a treat or a toy under a piece of furniture to see which paw they usually reach for the treat or toy with. If your pet wants to come inside, which paw does it typically use to scratch at the door? 

In all these cases, record which paw is used and once you’ve done several dozen (at least) such tests, check to see if there is a clear dominant paw. If not, continue on until one emerges. If you’ve done 100 to 200 or so such tests and there is no noticeable paw preference, your animal is probably ambidextrous.

Why does it matter if your animal favors one paw over another? Stefanie Schwartz, a vet at the Veterinary Neurology Center in Tustin, California, told the Daily Mail that determining laterality—or what part of the brain is dominant over the other—could one day help breeders figure out which puppies are best suited to be military, service, or therapy dogs.

Daven Hiskey runs the wildly popular interesting fact website Today I Found Out. To subscribe to his “Daily Knowledge” newsletter, click here.

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travel
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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Big Questions
Where Should You Place the Apostrophe in President's Day?
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Happy Presidents’ Day! Or is it President’s Day? Or Presidents Day? What you call the national holiday depends on where you are, who you’re honoring, and how you think we’re celebrating.

Saying "President’s Day" infers that the day belongs to a singular president, such as George Washington or Abraham Lincoln, whose birthdays are the basis for the holiday. On the other hand, referring to it as "Presidents’ Day" means that the day belongs to all of the presidents—that it’s their day collectively. Finally, calling the day "Presidents Day"—plural with no apostrophe—would indicate that we’re honoring all POTUSes past and present (yes, even Andrew Johnson), but that no one president actually owns the day.

You would think that in the nearly 140 years since "Washington’s Birthday" was declared a holiday in 1879, someone would have officially declared a way to spell the day. But in fact, even the White House itself hasn’t chosen a single variation for its style guide. They spelled it “President’s Day” here and “Presidents’ Day” here.


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Maybe that indecision comes from the fact that Presidents Day isn’t even a federal holiday. The federal holiday is technically still called “Washington’s Birthday,” and states can choose to call it whatever they want. Some states, like Iowa, don’t officially acknowledge the day at all. And the location of the punctuation mark is a moot point when individual states choose to call it something else entirely, like “George Washington’s Birthday and Daisy Gatson Bates Day” in Arkansas, or “Birthdays of George Washington/Thomas Jefferson” in Alabama. (Alabama loves to split birthday celebrations, by the way; the third Monday in January celebrates both Martin Luther King, Jr., and Robert E. Lee.)

You can look to official grammar sources to declare the right way, but even they don’t agree. The AP Stylebook prefers “Presidents Day,” while Chicago Style uses “Presidents’ Day.”

The bottom line: There’s no rhyme or reason to any of it. Go with what feels right. And even then, if you’re in one of those states that has chosen to spell it “President’s Day”—Washington, for example—and you use one of the grammar book stylings instead, you’re still technically wrong.

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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