Why do cats and other animals carry babies with their teeth by the withers? Detailed answer

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

Why do cats and other animals carry babies with their teeth by the withers? Detailed answer

Big encyclopedia for children and adults

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

Did you know?

Why do cats and other animals carry babies with their teeth by the withers?

Cats and many other mammals carry their young by the withers, which at this moment calm down and become almost motionless. The effect of appeasement can also be achieved in adult cats, if you collect the skin around the neck and fasten it with a regular clerical clip. Experiments on mice have shown that this behavior is determined purely physiologically. Individuals injected with an anesthetic into the neck did not decrease grasping activity because signals from the nerve endings did not reach the cerebellum. The evolutionary significance of this mechanism is that the children do not interfere with the mother to quickly move them in case of external danger.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

Why conduct a population census?

The census is a phenomenon as old as the collection of taxes or the creation of an army, although in earlier centuries it could have been called differently. In the past, rulers conducted a census in order to know how many people they could send to war and how much money they could collect from their subjects. Naturally, they tried their best to hide the truth from ordinary people who suffered from the consequences of the census.

In most countries, the population census asks people only the most important and at the same time simple questions regarding the age of people living in the house, their family ties, place of birth and nationality, and place of work. Sometimes questions are included about the date of marriage and the number of children, and in some cases (in rural areas) about the size of the family plot of land and the number of livestock. After collecting all the information, it is summarized and analyzed.

The results of the analysis are reported to the government. They play an important role in planning such areas of its activity as building the required number of schools in a particular region, forecasting the cost of pensions for the elderly, etc. When comparing the figures just obtained with the results of the previous census, one can judge whether the population, the rate of migration of people from the countryside to the city. They are objective indicators of improvement or deterioration in the living conditions of the population, development or decline in a particular industry.

In countries where government representatives are elected by vote, the number of representatives of a particular region in parliament is determined based on the results of the census.

Test your knowledge! Did you know...

▪ What is a vacuum?

▪ What was in America before its discovery by Columbus?

▪ Why do dogs wag their tail or tuck it in?

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:

The existence of an entropy rule for quantum entanglement has been proven 09.05.2024

Quantum mechanics continues to amaze us with its mysterious phenomena and unexpected discoveries. Recently, Bartosz Regula from the RIKEN Center for Quantum Computing and Ludovico Lamy from the University of Amsterdam presented a new discovery that concerns quantum entanglement and its relation to entropy. Quantum entanglement plays an important role in modern quantum information science and technology. However, the complexity of its structure makes understanding and managing it challenging. Regulus and Lamy's discovery shows that quantum entanglement follows an entropy rule similar to that for classical systems. This discovery opens new perspectives in the field of quantum information science and technology, deepening our understanding of quantum entanglement and its connection to thermodynamics. The results of the study indicate the possibility of reversibility of entanglement transformations, which could greatly simplify their use in various quantum technologies. Opening a new rule ... >>

Mini air conditioner Sony Reon Pocket 5 09.05.2024

Summer is a time for relaxation and travel, but often the heat can turn this time into an unbearable torment. Meet a new product from Sony - the Reon Pocket 5 mini-air conditioner, which promises to make summer more comfortable for its users. Sony has introduced a unique device - the Reon Pocket 5 mini-conditioner, which provides body cooling on hot days. With it, users can enjoy coolness anytime, anywhere by simply wearing it around their neck. This mini air conditioner is equipped with automatic adjustment of operating modes, as well as temperature and humidity sensors. Thanks to innovative technologies, Reon Pocket 5 adjusts its operation depending on the user's activity and environmental conditions. Users can easily adjust the temperature using a dedicated mobile app connected via Bluetooth. Additionally, specially designed T-shirts and shorts are available for convenience, to which a mini air conditioner can be attached. The device can oh ... >>

Energy from space for Starship 08.05.2024

Producing solar energy in space is becoming more feasible with the advent of new technologies and the development of space programs. The head of the startup Virtus Solis shared his vision of using SpaceX's Starship to create orbital power plants capable of powering the Earth. Startup Virtus Solis has unveiled an ambitious project to create orbital power plants using SpaceX's Starship. This idea could significantly change the field of solar energy production, making it more accessible and cheaper. The core of the startup's plan is to reduce the cost of launching satellites into space using Starship. This technological breakthrough is expected to make solar energy production in space more competitive with traditional energy sources. Virtual Solis plans to build large photovoltaic panels in orbit, using Starship to deliver the necessary equipment. However, one of the key challenges ... >>

Random news from the Archive

Ultrasonic tweezers move living cells 13.07.2012

Bioengineers and biochemists at the University of Pennsylvania have developed a miniature ultrasound device capable of capturing and moving single cells and tiny living organisms. The coin-sized device can be used to work with live samples such as blood cells or bacteria. Using a new device called acoustic tweezers, scientists have already been able to manipulate roundworm (Caenorhabditis elegans) 1 mm long. This organism is an important model for the study of several human diseases.

Acoustic tweezers are also capable of manipulating living cells, which are essential to many areas of basic biomedical science. The device is based on the use of a piezoelectric material that vibrates under electrical voltage. Vibrations induce surface acoustic waves in the liquid medium around the cell culture. With simple electronics, acoustic waves can be manipulated and organic and inorganic materials can be moved.

The main advantage of acoustic tweezers is their harmlessness to living cells. Currently, scientists use lasers to manipulate such samples. However, they consume 10 million times more energy and can heat up and damage cells.

Acoustic tweezers turned out to be very versatile: with its help, you can control both one particle and tens of thousands. For example, ultrasonic tweezers can place drugs directly on a bacterium and at the same time exert pressure on its cell wall. It can also be used to sort blood cells and cancer cells.

Currently, the size of objects that can be moved with acoustic tweezers ranges from micrometers to millimeters. The developers note that when using higher frequencies, it will be possible to move nano-sized objects.

Other interesting news:

▪ Bilingualism improves brain development in children

▪ 8 GB of video memory in a Eurocom laptop

▪ Dual-Image TVs

▪ It's time to fly on hydrogen

▪ Effect of stress on brain structure

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ site section Indicators, sensors, detectors. Article selection

▪ article You cannot harness a horse and a quivering doe into one cart .. Popular expression

▪ article Why do golf balls have holes? Detailed answer

▪ article Instructing group I on electrical safety. Standard instruction on labor protection

▪ article Compact fluorescent lamps. Classification. Encyclopedia of radio electronics and electrical engineering

▪ article Iranian proverbs and sayings. Large selection

Leave your comment on this article:

All languages of this page

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