At least 4 billion people in the world wear glasses, and 75% of the world's adult population uses some form of vision correction.

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This is the last white giraffe.

A GPS tracker has been attached to it to constantly protect it from poachers.

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The reason why we hate the recorded sound of our voice is because our skull changes the resonance of our voice from within and creates more bass. When we hear a digital recording of our voice, although slightly unfamiliar to ourselves, it’s exactly how other people hear it.

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🐦‍⬛️ The common swift holds a number of unique records in the bird world.

The bird can stay in the air without landing for 2-3 years, during which time it eats, drinks, mates, and covers a distance of up to 500,000 kilometers.

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Cristiano Ronaldo's full name is Cristiano Ronaldo dos Santos Aveiro. And Ronaldo is not a surname, but a middle name. His athlete was given in honor of the former US president and actor Ronald Reagan, whose fan was Cristiano's father.

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The baby pictured is Emma Gibson. Emma was frozen as an embryo back in 1992, but wasn't born until 2017 to a mother who was born in 1991.

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Nissan cars when shown in advertisements often have the number 23, because in Japanese, two is "ni" and three is "san."

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The word "school" originally emerged in Ancient Greece and meant "leisure, relaxation."

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Pandas have a sixth finger that helps them grip bamboo.

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Regularly taking cold or contrast showers stimulates cognitive abilities, enhances memory, and improves overall productivity.

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Hunger leads to a drop in serotonin levels, which can unleash a storm of emotions, including anxiety, stress, anger, and sadness.

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🦎Male lizards sometimes hang upside down in order to create a bed for it's female partner. Hanging on for dear life all night long, all so his favorite female can get a good night's rest.

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The expiration date on bottled water is actually for the bottle. Not the water.

Though water itself doesn't expire,bottled water often has an expiration date. This is because plastic can begin to leach into the water over time, contaminating it with chemicals.

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One apple eaten a day reduces the risk of kidney stones by 43 percent.

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The 'hair' of corn is the reproductive organ, part of the pistil designed to capture pollen in the air.

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A 46-year-old dyslexic man named Benjamin Bolger has earned 14 degrees so far in his life. He claims to be the second-most credentialed perpetual student in modern history.

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In Japan, there is an island called Okunoshima, where thousands of rabbits live.

They were brought to the island during World War II and have multiplied to a huge population.

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Squirrels will adopt another Squirrel Baby if its parents die or are unable to take care of them.

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