World of Knowledge – Telegram
World of Knowledge
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The most unusual facts collected from around the world🌎

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There is a shark that swims slower than all its victims

The average speed of the Greenland shark is 1.6 km/h. The maximum speed is about 2.5 km/h.

It is unclear how this species survives at all, if even seals swim twice as fast. Perhaps they hunt sleeping individuals.
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Eye color depends on iris pigment

Which is called "melanin." The amount of melanin determines the color of your eyes.

A large amount of this pigment creates dark eyes (black, brown, and light brown), and a smaller amount forms light eyes (green or blue).
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Kinetic installation Rain

Kinetic Rain is a 15-minute dance where two sets of drops move in unison, then mirror each other.
The installation's main goal was to create a soothing nook in the central lobby of the terminal.
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Now you have seen what a hedgehog skeleton looks like.
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Did you know that rain noise is bad for dogs' ears?

Dogs don't like to go outside in the rain, not because they're afraid of getting wet, but because the noise of the rain can damage their sensitive ears.
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The drone first delivered a human organ, which was then transplanted into a patient, in 2019.
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Guinea pigs are kind and sociable pets. They remember their name, like to sit in your arms and purr when you pet them.
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On the verge of death over food.😲
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Breathtaking views.
Mount Seceda, Italy.

Mount Seceda is part of the Dolomite Alps.
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One gram of gold can be used to pull a wire that is 2,610 meters long.

The resulting filament is very thin (2∙10-6 mm in diameter), which is necessary for today's electronics industry, where it is necessary to create electrical circuits in chips of very small size.
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The paintings of Aivazovsky, the famous marine painter, are so realistic that he was once even accused of fraud - evil tongues said that he placed lamps behind the paintings, which give his paintings such brightness.
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Indoor air is about 25 times dirtier than outdoor air.
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It will take 7 to 15 years to grow a Christmas tree.
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A seal accidentally startled a polar bear cub.
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Dolphins are predators that eat an average of 15 pounds of fish a day.

Their diet is very varied, but shrimp and squid are their favorite foods. Because dolphins eat a lot, their digestion is very fast.
They are one of the few marine species whose hunting style is similar to a wolf pack, where they work together and each plays a role. This makes them very good hunters.
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If you're having trouble learning a new language, try being inspired by Harold Williams.

This British journalist spoke 58 languages, making him one of the greatest polyglots in history. He once traveled to Serbia, where he learned to speak the locals in just two days and then impressed League of Nations delegates by speaking fluently to each of them in their native languages.

Not a man, but a Google translator!
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This is what the door looks like from the underground command post that was built in case of nuclear war at the base of Cheyenne Mountain, North America, in the 1950s and 1960s.

According to the creators' calculations, this structure could withstand the explosion of a five-megaton bomb, even if it detonated several kilometers away.
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Dragonflies are the fastest flying insects and their speed can reach 100 km/h.
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This is what a kangaroo bag looks like on the inside

Inside the pouch are mammary glands, so females carry their cubs in it for 46 weeks after they are born. A female kangaroo has to clean her pouch with her long tongue.
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A dangerous encounter between a porcupine and a human.

An adult North American porcupine has about 30,000 needles.

And if an enemy is encountered, these rodents shake their long needles, making a cracking noise that quickly scares off the predator.
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