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

Why do kangaroos have a pouch? 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?

Why do kangaroos have a pouch?

There are seven kinds of animals that have a pouch. For this reason they are called "marsupials" and one of them is the kangaroo.

The bag, which is located between the hind legs of a kangaroo, is the coziest and most comfortable house that a newborn can have. She keeps the baby warm, protects, allows him to move freely, enables the mother to feed him, since the mammary glands are in her bag. Nature has provided kangaroos and other marsupials with such an adaptation because their cubs are born very small and weak. A newborn kangaroo is a tiny, pink, naked creature just over 3mm in size. Can you imagine what would happen if such a helpless creature did not immediately get a place where warmth, comfort and protection await him?

The mother puts the newborn in a bag, and for 6 months it is his "home". Six months later, the young kangaroo is already the size of a puppy. But life in a bag is too good to want to leave it. So the baby (Joey, as they call him in Australia) turns in all directions in his bag, while his head sticks out far enough to grab the leaves when the mother stops to pinch them from the branches of trees. Even after the mother taught the kangaroo to walk and jump, the bag continues to be his home. At the slightest danger to the baby, the mother jumps up to him, grabs him with her mouth and carefully lowers him into the bag.

There are over 120 different varieties of kangaroos. The smallest of them, only 0,6 m tall, is the wallaby. And the largest is a huge red or gray kangaroo, about 1,8 meters!

Kangaroos have short front legs, while the hind legs, on the contrary, are very long with one big sharp toe in the middle of the foot. With the help of its powerful hind legs, the kangaroo jumps 3-4 meters or more. He rests on his long tail. Kangaroo is able to move very quickly, and his hearing is so thin that he can hear the enemy at a great distance.

Author: Likum A.

 Random interesting fact from the Great Encyclopedia:

What is the fun of kings?

At various times, the phrase has been applied to such pastimes as chariot racing, jousting, falconry, bowling, polo and, in the not too distant past, horse racing.

And yet, for most of the 2000 years of world modern history, there is "fun" that rightfully belongs to the title of "royal". It's about cockfights.

Before the official prohibition in 1835, cockfighting in Britain was considered a truly national sport. There was no village that could not boast of at least one cockfighting arena. Cockfighting was the entertainment of absolutely all classes, from the nobility to ordinary schoolchildren. Special grounds for this sport existed even in the Palace of Westminster and Downing Street. On the last day of Shrovetide, boys - for a nominal fee of one penny - were allowed to bring fighting cocks to school and arrange cockfights.

Nobody knows how and when fighting cocks appeared in Britain. There is a legend that Phoenician merchants brought them, however, most likely, fighting cocks came to Britain in the Iron Age, along with tribes migrating from the east. In 54 BC. e. Julius Caesar was unspeakably surprised to learn that the Britons do not breed birds for meat, but for fighting.

Fighting cocks are generally recognized as the most aggressive of all poultry species. A good rooster fights to the death without any goading. All connoisseurs are unanimous in the opinion that it is in the fighting cock that the ideal of cock beauty is embodied.

The competition among the "cockerels" has always been very tough. Recipes for a special bread that "gives courage" were kept in the strictest confidence, although almost every "cockerel" certainly soaked it in warm urine. The comb and beard were removed (or leveled) from the rooster, and steel spurs (darts) were put on the legs.

It was considered commonplace for a real "cockerel" to wash the head of a wounded rooster, putting it in his mouth and sucking it clean. Horse racing and cockfighting were often held at the same time, since both were gambling entertainment where bets were made.

Some breeds of fighting cocks have become a real legend. So, the breed, bred by Dr. Belley, who lived near Chester, was famous for its "Cheshire blow" - a sudden explosion of deadly cruelty, when the rooster seemed to have "leaked" the fight.

In Louisiana and New Mexico, cockfighting is still legal and legally only considered a misdemeanor (bordering on a misdemeanor) in another sixteen states, such as Tennessee and Arkansas.

A rooster is a male older than one year; the younger ones are considered "roosters", or "colts", in the jargon of "roosters".

 Test your knowledge! Did you know...

▪ Why do muscles hurt after exercise?

▪ Why are the natives of America called Indians?

▪ What are the characteristic features of Medieval urban crafts?

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:

Machine for thinning flowers in gardens 02.05.2024

In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers. ... >>

Advanced Infrared Microscope 02.05.2024

Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>

Air trap for insects 01.05.2024

Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>

Random news from the Archive

Sun dimming to combat warming 01.12.2018

Cooling the Earth by injecting solar-blocking particles into the stratosphere can be very cheap. So, at least, says the most detailed engineering analysis of this project.

There is a project that can cool the Earth by launching millions of tons of sulfate particles into the atmosphere. This form of geoengineering is reminiscent of the effect of volcanic eruptions, which have significantly lowered global temperatures in the past.

Perhaps the most efficient and cheapest way to deliver particles would be to develop a new type of aircraft. If sulfates are released from ordinary jet aircraft, all particles will fall to the ground in a few days.

Currently, no aircraft can deliver many tons of particles to a height of 20 km. That is where they have to be in order to stay in the atmosphere for at least a year. And the use of rockets turns out to be too expensive. The new aircraft should have larger wings and four engines instead of two, as the air at that altitude is much less dense. The design of such a vessel will be unusual, but in general, no technological breakthroughs are needed to create it.

For a 15-year program, eight of these aircraft would need to be added each year, plus costs for crew, maintenance, fuel, insurance and training. The program is estimated to start with 4000 flights a year and end with 60 flights a year with nearly 000 aircraft. As the scientists comment, only the number of planes and flights will guarantee that such a plan cannot be carried out in secret.

What can be achieved with such a daring plan? Reducing warming by 0,1 degrees Celsius per year, which in general will give a decrease in temperature by 1,5 degrees, which in theory should be enough to prevent catastrophic climate warming.

How much does such a project cost? "We have shown that such a hypothetical program would be technically possible," says Harvard University's Gernot Wagner. By comparison, about $2 billion a year is now invested in green technologies every year.

Other interesting news:

▪ Control brightness without a slider

▪ Organic stone age paint

▪ Smartphone Fujitsu Arrows A 202F

▪ An affordable way to prevent caries

▪ Signal circuit boards found inside human cells

News feed of science and technology, new electronics

 

Interesting materials of the Free Technical Library:

▪ site section Indicators, sensors, detectors. Article selection

▪ Article Useful tips for video editing. video art

▪ article What would happen on Earth if our planet did not have a moon? Detailed answer

▪ Marjoram article. Legends, cultivation, methods of application

▪ article Antenna amplifier of the range of 2 meters. Encyclopedia of radio electronics and electrical engineering

▪ article Pedalless wow-prefix. Encyclopedia of radio electronics and electrical engineering

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