The United States Constitution is the only constitution from the 18th century that's still in use.

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A person undergoes a complete renewal every 7 years.

The human body is constantly in motion: shedding and regrowing skin, renewing lungs, growing new hair.

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Victoria Falls is one of the most famous waterfalls in the world, attracting thousands of tourists annually.

Its width is a whopping 1700 meters.

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Dolphins have their own names, and they recognize each other by these names.

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When young people are affected by grief, their immune system

becomes stronger. However, when older people experience grief, their immune system weakens. This may explain why many elderly couples pass away only a short time apart.

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If a Google employee dies, their spouse will receive half their pay for 10 years as well as stock benefits, and any children will receive $1000 a month until they turn 19.

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If you combine all the ants in the world, they'll weigh about the same as if you combine all the people.

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Social media is psychologically designed to be addictive and part of that has to do with infinite scroll.

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Instead of going to dinner and movie, go to the movie first and then dinner. This way at dinner you have something to talk about.

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People who stay up late tend to be risk-takers, a study found.

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The dot on top of the letter "i" is called a tittle

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The longest fingernails on a single hand - ever measured an aggregate length of 909.6 cm (358.1 in). This record is held by Shridhar Chillal (India), who grew the nails on his left hand

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The first stock exchange was established in 1602 in Amsterdam. It was set up to trade shares of the Dutch East India Company.

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Sloths can hold their breath for up to 40 minutes - nearly twice as long as dolphins can.

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The name of the Apple voice assistant Siri is a Norwegian female name.

• It means "Beautiful woman leading you to victory."

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The blinking of a human eye takes about one-tenth of a second. In that time, you're actually blind for a brief moment, but your brain is so good at processing visual information that you don't even notice.

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There is a tribe in Zimbabwe who have two toes on each foot. It possibly aids in tree climbing. The condition prevails because of a small genetic pool among the Vadoma and is propagated by the tribal law that forbids members to marry outside the group.

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Singapore is the only country on earth whose citizens don’t need a Visa to enter North Korea, South Korea, China or the United States.

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Crocodiles, birds, and dinosaurs have a common ancestor that lived around 240 million years ago, making them evolutionary "relatives."

Dinosaurs went extinct, and now crocodiles are the closest living relatives to birds.

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Despite being called the "Sunshine State," Florida is actually one of the rainiest states in the US.

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