What was a Cro-Magnon? Detailed answer

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What was a Cro-Magnon? Detailed answer

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What was a Cro-Magnon?

There was a time in the thousand-year course of human development when man lived in caves. Probably the most interesting cave dwellers were the Cro-Magnons. They lived in Europe at the end of the Ice Age. They are so named only because the remains of these cave dwellers were found in the town of Cro-Magnon in southern France.

Also interesting is the fact that experts who studied the remains, the skeletons of these cave dwellers, found that they were quite civilized and intelligent people. If they lived today, they could become scientists, statesmen or businessmen. These people lived in turbulent times, surrounded by wild animals and other dangers. But despite this, they found time to make beautiful drawings on the walls of the caves.

The drawings have come down to our time, are well preserved and delight us with their beauty and skillful technique. These people had a well-developed social life. They lived in families. But since they began to hunt in groups, they had to unite in tribes. They believed in the afterlife: that the dead could be resurrected and reborn in the other world.

Gradually they created more advanced stone tools and new weapons. They learned how to carve a spear and a harpoon from horn and bone. They also invented arrows for guns. Women learned how to process skins and sew clothes from them with bone needles. As we can see, these people had intelligence and reached a high stage of development.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

What technical innovation led to the defeat of the German submarine fleet in World War II?

In the early years of World War II, Hitler's submariners, who used the "wolf pack" tactics, achieved stunning success. During the first four months of the war, they sank 810 Allied ships, and in 1940 and 1941, 4407 and 4397 ships, respectively. But the triumph of the Nazi submarine fleet took place in 1942: 8245 ships were launched to the bottom, or 6,2 million tons of Allied merchant tonnage!

However, at the end of the same year, Nazi submarines that entered the ocean communications began to disappear without a trace. The commanders of several miraculously surviving boats told what happened. At night, in fog, in conditions of poor visibility, when the boats were moving to the designated position on the surface, an aircraft suddenly appeared at a low altitude and unmistakably, for sure, dropped bombs on them.

The successes of the German submarine fleet declined sharply, and the losses in the boats reached monstrous proportions. If in 1939 9 Nazi submarines perished, in 1940, 1941 and 1942 - respectively 22, 35 and 85 boats, then in 1943 - 237 submarines! Losses exceeded the number of boats commissioned.

And the reason for such a crushing defeat of the Nazi submarine fleet was that in 1942 the British installed radar stations on aircraft. In order to be able to systematically view a large area of the sea surface from an aircraft, the installations were equipped with rotating antennas and panoramic indicators. With a flash of the reflected signal in the panorama, the aircraft turned to the target and, approaching the firing distance, turned on the searchlights and brought down on the submarine the fire of on-board weapons and bombs.

Over the noise of their own diesel engines on the boat, an approaching aircraft was not heard, and the factor of surprise made the submariners completely helpless.

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Advanced technology for recycling waste office equipment 21.12.2006

Sooner or later, one way or another, a computer, TV or mobile phone will one day cease to be a luxury item and go to a landfill.

For example, in Germany alone, two million tons of electronic scrap are found there every year. And one fifth of this weight, that is, 400 thousand tons, falls on plastics. However, only 1% of them can be recycled.

The problem is that such plastics contain heavy metals, bromine-based fire-fighting additives, and all kinds of pigments. All of them are harmful to the environment and, in accordance with EU directives, must not enter the product obtained during processing. And another directive requires that 75% of plastic waste be recycled. Puzzled by these instructions, European engineers are trying to find a way out.

One of the methods was proposed by scientists from the Fraunhofer Institute for Engineering Processes and Packaging, together with the Crea-Cycle company from the city of Grebenbroich. They managed to bring the degree of waste recycling to 95%.

"First of all, we grind electronics-containing waste in giant mills and remove metals," says project manager Dr. Andreas Maurer. "What remains is a mixture of crushed plastic and wood. harm to the environment. The insoluble and dangerous components of the garbage remain. However, they will not necessarily return to the landfill: there are consumers in the chemical industry for them."

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