Menu English Ukrainian russian Home

Free technical library for hobbyists and professionals Free technical library


BIG ENCYCLOPEDIA FOR CHILDREN AND ADULTS
Free library / Directory / Big encyclopedia for children and adults

Who are the cavemen? Detailed answer

Big encyclopedia for children and adults

Directory / Big encyclopedia. Questions for quiz and self-education

Comments on the article Comments on the article

Did you know?

Who are the cavemen?

Thousands of years ago, people did not know how to build houses and therefore lived in stone caves. However, it should be noted that the very first inhabitants of the caves did not even look like us.

These creatures are called Neanderthals by modern scientists. Their brain - one of the main differences between man and animal - was the same size as that of modern people, but they had very coarse features with heavy eyebrows hanging over their eyes. The growth of Neanderthals did not exceed 160 cm, their posture was not as straight as that of today's people. The "cavemen" did not care too much about the cleanliness of their dwellings, and therefore all the garbage was left right on the floor.

For a thousand years, some caves were almost filled to the brim with decayed piles of waste. Being inside their dwellings, cavemen were afraid of the huge size of the caves and the impenetrable darkness that reigned in them. Therefore, they tried to stay at the entrance to the caves, whose vaults protected them from wind, rain and snow, and did not dare to climb inside. At the end of the ice age, the Cro-Magnons - the descendants of the Neanderthals, whose appearance was already much more similar to the appearance of modern people - began to move to Europe.

However, they, like their predecessors, continued to live in caves. Gradually, their number increased, and there was not enough space in the cave for everyone. Then some of them began to build huts from branches or dig a dwelling in the ground.

It was the Cro-Magnons who were the authors of the famous cave paintings in southern France and northwestern Spain. These drawings are remarkable in that they are an achievement - they are the first works of art created by people. They are very expressive and testify to the rich imagination and talent of their creators, who depicted mainly animals that the Cro-Magnons hunted: bison, bears, wild boars, mammoths and rhinos.

Author: Likum A.

 Random interesting fact from the Great Encyclopedia:

Who are pinnipeds?

Pinnipeds are mammals whose limbs have turned into fins, which they use when swimming as oars. The three main families of pinnipeds are walruses, sea lions and seals. All of them are carnivores. These aquatic predators have the same ancestors as those of the earth, such as dogs, cats, and bears. Probably millions of years ago, one group of carnivores moved into the sea and gradually adapted to life in it.

Now about thirty species of pinnipeds live in the world's oceans. Most of them live in the cold waters of the Arctic Ocean and in the parts of the Atlantic and Pacific Oceans surrounding Antarctica. Several species of them live in warm waters, and even fewer in fresh water lakes.

Since pinnipeds spend most of their lives in the water, they have adapted very well to such an existence. They are all excellent swimmers. Their bodies are streamlined, with a thick layer of fat underneath their skin that adds to their buoyancy and helps retain heat. The fat layer also serves as a food reserve when necessary. Pinnipeds are first-class divers. They can dive underwater in search of food to a depth of sixty to ninety meters. Many of them have large eyes that see well in the dark depths of the sea. When pinnipeds are underwater, their nostrils close. Most of them have sharp, backward-curved teeth with which they grab and hold prey, and then send it down the throat.

Pinnipeds are collectivists and live together for a long time in large herds, especially during the mating season and when cubs are born. All of them, intending to bear offspring, return to the earth, in any case, to the coastal edge of the ice. Young pup seals, sea lions and walruses are born sighted, and their body is covered with thick hair or down.

 Test your knowledge! Did you know...

▪ How does an octopus move?

▪ Why do baby kangaroos stay in a pouch for so long?

▪ Which gymnast brought his team an Olympic gold medal with a broken knee?

See other articles Section Big encyclopedia. Questions for quiz and self-education.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Artificial leather for touch emulation 15.04.2024

In a modern technology world where distance is becoming increasingly commonplace, maintaining connection and a sense of closeness is important. Recent developments in artificial skin by German scientists from Saarland University represent a new era in virtual interactions. German researchers from Saarland University have developed ultra-thin films that can transmit the sensation of touch over a distance. This cutting-edge technology provides new opportunities for virtual communication, especially for those who find themselves far from their loved ones. The ultra-thin films developed by the researchers, just 50 micrometers thick, can be integrated into textiles and worn like a second skin. These films act as sensors that recognize tactile signals from mom or dad, and as actuators that transmit these movements to the baby. Parents' touch to the fabric activates sensors that react to pressure and deform the ultra-thin film. This ... >>

Petgugu Global cat litter 15.04.2024

Taking care of pets can often be a challenge, especially when it comes to keeping your home clean. A new interesting solution from the Petgugu Global startup has been presented, which will make life easier for cat owners and help them keep their home perfectly clean and tidy. Startup Petgugu Global has unveiled a unique cat toilet that can automatically flush feces, keeping your home clean and fresh. This innovative device is equipped with various smart sensors that monitor your pet's toilet activity and activate to automatically clean after use. The device connects to the sewer system and ensures efficient waste removal without the need for intervention from the owner. Additionally, the toilet has a large flushable storage capacity, making it ideal for multi-cat households. The Petgugu cat litter bowl is designed for use with water-soluble litters and offers a range of additional ... >>

The attractiveness of caring men 14.04.2024

The stereotype that women prefer "bad boys" has long been widespread. However, recent research conducted by British scientists from Monash University offers a new perspective on this issue. They looked at how women responded to men's emotional responsibility and willingness to help others. The study's findings could change our understanding of what makes men attractive to women. A study conducted by scientists from Monash University leads to new findings about men's attractiveness to women. In the experiment, women were shown photographs of men with brief stories about their behavior in various situations, including their reaction to an encounter with a homeless person. Some of the men ignored the homeless man, while others helped him, such as buying him food. A study found that men who showed empathy and kindness were more attractive to women compared to men who showed empathy and kindness. ... >>

Random news from the Archive

A substance has been discovered that accelerates wound healing 21.03.2022

Dutch biologists have isolated a substance from human saliva that significantly accelerates wound healing, which can help in the creation of drugs for those suffering from chronic ulcers, in the treatment of burns.

"We hope that our discovery will ultimately benefit people suffering from incurable wounds such as foot or diabetic ulcers, as well as cuts and burns," said study lead author Menno Oudhoff.

To study the effect of human saliva on wound healing, scientists cultured human epithelial cells from the inside of the cheek in cups. They then inflicted an artificial wound on the resulting cell film. After that, one cell culture was placed in an isotonic solution without foreign impurities, and the other - in human saliva. After 16 hours, the researchers found that the “wound” had completely healed in the saliva cup, while it remained open in the solution cup. From this it followed that saliva contains a substance that accelerates the healing of wounds.

Since saliva is a complex liquid containing many components, it was necessary to find out which substance heals wounds. Scientists divided saliva into components, tested them and found out that the protein histatin is responsible for wound healing.

This study explains not only why animals lick their wounds, but also why wounds in the mouth, for example, after tooth extraction, heal faster than those on the skin. It also shows us the way to create new drugs.

Other interesting news:

▪ Lithium for the treatment of mental disorders

▪ FMS6151 ICs for communication of cell phones with large screens

▪ Africa feeds Brazil

▪ WiFi MP3 player

▪ New series of miniature limit switches

News feed of science and technology, new electronics

 

Interesting materials of the Free Technical Library:

▪ section of the site Grounding and grounding. Selection of articles

▪ article I can't think twice about the same thing. Popular expression

▪ article In which city is the arrival of spring announced by a special decree dependent on the blooming of the chestnut tree? Detailed answer

▪ China's article. Legends, cultivation, methods of application

▪ article Preamplifier on the chip K140UD1B. Encyclopedia of radio electronics and electrical engineering

▪ article Behind the wheel - automatic. physical experiment

Leave your comment on this article:

Name:


Email (optional):


A comment:





All languages ​​of this page

Home page | Library | Articles | Website map | Site Reviews

www.diagram.com.ua

www.diagram.com.ua
2000-2024