Sleeping human brains can still understand the words spoken around them.

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Lake Superior holds roughly 10% of the world's freshwater and has a surface area similar to South Carolina. Its water volume is approximately 2,900 cubic miles, making it the largest freshwater lake by volume globally.

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✅ The average person produces about 0.5 to 1.5 liters of saliva per day.

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Over time, facial hair can help slow the aging process by preventing water from leaving your skin, keeping it moisturized.

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If your throat tickles, scratching your ear can make it go away.
Scratching your ear can sometimes help relieve an itchy or ticklish feeling in your throat. The reason for this is that the nerves in your ear are connected to the nerves that control your throat and can stimulate a reflex that causes the muscles in your throat to contract, which may help to relieve the tickling sensation.

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Listening to music at high volumes can make a person calmer, happier and more relaxed.

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Giraffes have a very strong heart that pumps blood twice as hard as a cow's heart in order to get blood to its brain. The giraffe's long neck presents a challenge in terms of blood flow, as the heart has to work extra hard to pump blood all the way up the neck and into the brain. In order to achieve this, the giraffe's heart has a thicker left ventricle wall than other mammals of a similar size, which allows it to pump blood more forcefully. Additionally, giraffes have a very high blood pressure, which helps to get blood to the brain more efficiently.

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There are more chickens than people in the world.

What is the chicken to human ratio? In 2020, there were over 33 billion chickens in the world—and there were only 7.76 billion humans. This means there are over four chickens for every person in the world!

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Baby turtles communicate with one another while still in their shells so that they all hatch at the same time.

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Hangovers are the result of hormone level changes in your body meant to reduce dehydration and cellular damage caused by alcohol. You feel hungover until the level of ethanol in your blood slowly returns to zero, which can take up to 48 hours.

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Fast food bread contains a chemical substance called azocarbondiamide. It makes the mixture more elastic.
It's funny, but the same substance is used in the production of yoga mats.

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Queen Elizabeth has met 12 US presidents during her reign, more than a quarter of all presidents since the nation's founding.

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China is reportedly first consumer of snake wine which is an alcoholic beverage produced by infusing whole snake in grain alcohol.

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Cats’ urine glows under a black light. The Urine glows under a black light primarily because it contains the element phosphorus.

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