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.

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!

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.