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

Can a cat see in the dark? 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?

Can a cat see in the dark?

Perhaps you have a cat at home. You love to hold your pet in your arms, play with her and feel that she is almost a member of the family. But a cat is one of the strangest creatures on earth. Despite being tamed and living with humans for thousands of years, it always seems like it only takes one step for her to return to the jungle.

The cat is a close relative of the lion, tiger and leopard, and in principle behaves the same way as they do. For example, a cat lies in wait for a victim, and then jumps on her back in the same way as a lion kills his enemies. A cat can make a jump of two meters! She has soft pads on her paws, which allows her to absolutely silently sneak up on the victim. And in the paws are hidden 18 claws, which she can release and put back.

But what gives a cat the ability to see in the dark? Her eyes can adjust to light sources of varying brightness. In bright light, her pupils look like narrow slits. In the dark, they become wide, almost the entire eye. This does not mean that a cat can see in absolute darkness, it just needs much less light than other animals. The eyes of cats are convex, which allows you to collect light rays from a wider area. When her eyes reflect all this light, they seem to glow.

Cats can live from 13 to 20 years, but their average lifespan is 14 years.

Author: Likum A.

 Random interesting fact from the Great Encyclopedia:

In which country did viewers choose the reality show contestant who would get a donor kidney?

On July 1, 2007, the reality show "De Grote Donorshow" aired on the Dutch channel BNN. Its main character was a terminally ill 37-year-old woman who wanted to donate her kidney. Which of the 25 applicants will get this kidney was decided by the audience using SMS voting. At the end of the show, it was announced that the woman was an actress and she had no illness, and the purpose of the program was to draw public attention to the lack of organ donors in the Netherlands. And although the authors of the show received a flurry of criticism for immorality, the number of registered donors in the country has increased dramatically.

 Test your knowledge! Did you know...

▪ Where and when was printing invented?

▪ During which war was the United States the only power friendly to Russia?

▪ Who and when sold the Eiffel Tower for scrap?

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

World's largest magnet under construction 27.01.2015

Indian scientists have begun building a $235 million underground laboratory to study neutrinos.

Scientific experiments in it will be carried out using a grandiose magnet weighing 50 tons, which is almost four times heavier than the magnet in the Large Hadron Collider. The initial plan to locate the laboratory in Singara was rejected by ecologists because of its proximity to a nature reserve with elephants and tigers, so Indian scientists will eventually study the properties of neutral particles in an observatory under Mount Ino near the city of Madurai.

The laboratory, which is being built at a depth of 1,3 km, will include three compartments, the largest of which, measuring 132 x 26 x 30 meters, will house a neutrino detector. It will track the particles that are produced when the Earth's atmosphere interacts with cosmic rays. Placing the detector in an underground cave will protect it from extraneous "noise" arising from other particles, and the laboratory's equatorial position will allow tracking neutrinos flying from the Sun and passing through the Earth's core.

Other interesting news:

▪ A quantum computer that does not use qubits

▪ Travel faster with a mobile phone

▪ Named the reason for the rapid growth of black holes

▪ Optical zoom smartphones without increasing their size

▪ Plastic planes getting ready to take off

News feed of science and technology, new electronics

 

Interesting materials of the Free Technical Library:

▪ section of the site Personal transport: land, water, air. Article selection

▪ article Stay with nothing. Popular expression

▪ article How was the Witwatersrand, the world's largest gold ore deposit containing uranium, discovered? Detailed answer

▪ article Pterocarpus sacculus. Legends, cultivation, methods of application

▪ article Electric floor polishers. Encyclopedia of radio electronics and electrical engineering

▪ article Domestic coaxial cables RK50-0.6-21 - RK50-2-26. 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