Hypersomnia, a condition where a person can sleep for 12 - 15 hours but still wake up feeling tired.

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Rectal tenesmus: The technical term for that feeling you get when you can't seem to finish pooping completely.

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Rhythm is the longest word without vowel .

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Hugging yourself can boost oxytocin levels and reduce stress. It can even increase your pain tolerance.

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Research suggests that laziness is just a natural part of being a teenager and doesn't reflect bad behavior.

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Human testicles have taste buds that can detect sweet flavors.

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Bananas are curved because they grow against gravity. They grow towards the sun instead of the ground.

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Every time you learn a new fact, your brain changes. It's called neuroplasticity.

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Cataplexy is a rare sleep disorder that causes sufferers to fall asleep whenever they laugh.

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Having an O blood type makes you twice as likely to attract mosquitoes than people with A blood type. B blood types fall in the middle of the spectrum.

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Your mouth blows warm air when you say "haaah" but cold when you say "whooh"

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In Iran, citizens can be sentenced to death if they convert away from Islam.

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Canada is the most educated country in the world. More than half of its residents have college degrees.

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Pandas can produce as much as 48 pounds of poop every day.

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Cockroaches are so repulsed by humans that if they're touched by a human, not only do they run away, but they wash themselves.

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Gymnophoria is the sense that someone is mentally undressing you.

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The word 'husband' likely came from the Old Norse word 'husbondi,' which literally meant 'house-dweller.'

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Music is so influnential on the brain that the type you listen to actually has the ability to change the way you think and look at the world.

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Nillionaire: a person with little or no money of their own

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