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17 Facts That Are 100% True And 100% Freaky

Most people have an above-average number of arms.

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2. If you folded a regular piece of notebook paper in half 45 times, it would be thick enough to reach the moon.

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Granted, it's not actually possible to fold a piece of paper in half that many times. But if you could, 45 folds would bring you to the moon. That's the power of exponents, y'all!

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3. Every time you shuffle a deck of cards, you are likely the first person in the history of the universe to create that exact sequence.

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There are 8 x 1067 possible ways to shuffle a deck of cards — that means there are more ways to shuffle a deck than there are atoms on Earth. Most possible card sequences have never been shuffled before, so every time you play Go Fish, you're likely to make history.

6. You know those dotted lines on the road that separate lanes? Most drivers estimate them to be 2 feet long. In actuality, each of those stripes is 10 FEET LONG.

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Your brain doesn't always interpret geometry correctly! Scientists have attributed this common misconception to a phenomenon known as "size constancy."

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8. Most people have an above-average number of arms.

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Since some people have no arms or one arm, the average number of arms a person has is somewhere just under two. So if you have two arms, you've got more arms than average.

9. There's a number out there called Graham's number. It's so large that trying to interpret it might literally turn your brain into a black hole.

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Your brain can only contain so much info, and Graham's number has more digits than any human brain can hold. According to a physicist from the University of California, Irvine, trying to store all of Graham's number in your brain would turn it into a black hole.

12. If someone tells you they have two kids and one is a boy, the odds that the second child is a girl are two out of three, NOT 50-50.

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Now, we're talking probability here, NOT biology. From a biological perspective, it's a 50-50 shot, like you'd probably assume. But in terms of mathematical probability, there's a two-out-of-three chance the other kid's gonna be a girl. Numbers are cray!

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13. Imagine you have a rope long enough to wrap around the entire circumference of the globe. The rope is 24,901.55 miles long. You now want to lengthen the rope so that it can hover one foot off the ground at all points on Earth. How much more rope do you need to make this happen? Just 6.28 feet.

14. And what if you want to do the exact same thing, but with a tennis ball? Let's say your rope is currently 8 inches long. How much more rope do you need to give a foot of clearance around the entire ball? 6.28 feet — just like in the globe example.

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No matter the size of the ball, the answer will always be 6.28 feet, or 2π.

15. There's a 3D shape called Gabriel's Horn, which has infinite area BUT a limited volume. In other words, you could fill the horn with paint, but you couldn't actually paint it.

16. Statistically speaking, your friends will always have more friends than you do.

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You know how the people you follow on Twitter tend to have more followers than you do? That's a real mathematical phenomenon called the "friendship paradox," and it's true for real life, too.

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