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.

Dragonflies are the fastest flying insects and their speed can reach 100 km/h.

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.

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.

More than 80% of the female population of planet Earth has asymmetry of the breasts, where one is noticeably larger than the other. Interestingly, it is the left breast that is larger in 92%.

Lion cubs are born blind and very small, averaging 1.5 kg.

After about 7 days they become sighted, and after two weeks they begin to move on their own.

The U.S. has released a beer for dogs. It is a non-alcoholic mix that can be used as a substitute for dog food.

There is only one river in Antarctica - Onyx, it flows only 60 days a year.

It takes more than a year for real Parmesan to ripen.

There are people in the world with a mental disorder who think they are a cow - no, it's not schizophrenia

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$10,000 is how much a blank painting called "Fresh Air" cost.

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Boys who have been given unusual names are more than 50% likely to have mental problems. Girls do not have such a relationship.

Hotel Costa Verde, Costa Rica

An incredible luxury hotel, based on the fuselage of a Boeing 727, located in the rainforest, overlooking the Pacific coast.
This airplane has been out of service for a long time. Now this 1965 airplane takes on guests rather than passengers.

In legal practice, several cases have been recorded when identical twins were acquitted, although it was known for sure that one of them was guilty.

The fact is that complete twins have almost identical DNA, and the legal system cannot afford to punish an innocent, that is, the wrong twin, for a crime that he did not commit.

In Finland, up to 4,000 deer died under the wheels of cars every year. This is in the past. Resourceful foresters came up with the idea of spraying deer antlers with reflective liquid.

The ram Shrek once escaped from a farm and wandered over the mountains for 6 years. After catching with it, they cut 27 kg of wool. He was driven from the mountains by the wolves, who could not bite through the wool, and he walked in front of them, mutely reproaching their helplessness.

Handwriting is as unique as a fingerprint, voice, or retina.

The pink pigeon lives only in the south of Mauritius. It feeds on fruits and seeds. A very rare bird, on the verge of extinction.

A crocodile's head floating on the surface of the water looks scary. But few people know what may be happening under water at this moment.