When did cats become pets? Detailed answer

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When did cats become pets? Detailed answer

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When did cats become pets?

When most people say "cat", they think of a small pet. But the feline family is amazing and includes leopards, lions, tigers and jaguars! All cats, big or small, have basically the same body proportions and eat roughly the same food. All cats eat meat and kill their victims.

Depending on the size of cats, small mice, and large zebras, deer, antelopes and cattle can serve as food for them. Cats have soft pads on their paws that allow them to move very quietly. She also has five sharp claws on her front paws and four on her hind legs. Cats can make a variety of sounds: meowing, purring, howling and screeching. Some of the larger felines often roar.

By the way, due to the structure of certain bones in the throat, neither a lion, nor a tiger, nor a leopard, nor a jaguar can purr. Members of this family have been found throughout the world since time immemorial. Fossilized remains of cats found that are millions of years old! But the domestication of cats began relatively recently in relation to the history of man. It is now believed that cats were domesticated 4500 or possibly 5000 years ago.

Probably one of the small wild cat species of Europe, North Africa or Asia became the ancestor of the domestic cat. We know that the ancient Egyptians domesticated cats 4000 years ago and deified them. Their goddess Bast (or Buttermilk) was depicted in drawings with a cat's head, and sacrifices were made to cats. The cat also accompanied their supreme gods - Ra and Isis.

When a domestic cat died in an Egyptian family, all family members and servants shaved their eyebrows and wore mourning. The death of a temple cat plunged the whole city into mourning. Numerous mummies of cats have been found, made in the same way as the mummies of pharaohs and noble people.

The punishment for killing a cat was the death penalty! Domestic cats appeared in Europe around 1000 AD. e., and since then cats are more often considered not a deity, but the embodiment of the forces of evil!

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

How do we manage to maintain balance?

One of the most amazing skills that can be learned is our ability to stand or walk. It is indeed a skill and can be mastered. If an alien from another planet, who himself walks on four legs, looked at us, he would be amazed at how we manage to do this. If he tried to do it, it would take him a long time to learn it, just as it took us a fair amount of time to do it when we were small.

When you stand still, you are making constant moves to maintain your balance. You shift from foot to foot, you use pressure on your joints, and your muscles tell your body how to behave. Just keeping our balance while standing still requires the work of about three hundred muscles! That's why we get tired when we stand. Our muscles don't stop working.

Indeed, standing is also work! When walking, we use not only balance skills to help us, but also two natural forces. The first is air pressure. Our femur fits so tightly into the socket of the pelvic joint that a kind of vacuum forms. The air pressure on our feet helps to hold them securely in the joints. The same air pressure allows the leg to hold on to weight. The second natural force that we also use when walking is gravity. After our muscles tighten the leg, the force of gravity causes it to lower and make pendulum movements.

When you see a circus performer walking a tightrope with balance, remember that he is only doing a more difficult version of what you have to do every day. And just like you, he has to learn it and train for a very long time!

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Created the strongest acid 18.07.2005

At the University of California (USA), with the participation of employees of the Institute of Catalysis of the Siberian Branch of the Russian Academy of Sciences (Novosibirsk), an acid has been created that is a million times stronger than concentrated sulfuric acid. The paradox is that the new acid is not at all aggressive towards materials.

The compound, called carboranoic acid, is the first "super acid" that can be stored in glass bottles. This softness of the new acid is due to its unusually high chemical stability.

Like all acids, the new substance interacts with other compounds, giving them a positively charged hydrogen ion. However, the remaining negatively charged anion is so stable that it does not react further. But it is this secondary reaction that is very significant in corrosion. For example, hydrofluoric acid attacks glass, which is mostly silica, by reacting its negatively charged fluorine ion with silicon and its hydrogen ion with oxygen.

The new acid - its formula H(CHB|1C111) - is an excellent hydrogen ion (proton) donor, which determines the "strength" of the acid. There are much more of these ions in its solution than in sulfuric or nitric acid. However, the carborane part of the acid, which remains after the departure of the hydrogen ion, contains a group of 11 carbon atoms that form the spatial structure of an icosahedron (twenty-sided).

Such a structure is the most stable of the groups of atoms existing in chemistry, which explains the corrosion inertness of the acid.

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