At night, or by artificially blinding bats, bats can still fly freely and avoid obstacles.

Scientists invented radar based on the echolocation and pathfinding methods of bats. The role of radar is very extensive, and the planes we often take are also inseparable from the help of radar. The radar sends out radio waves through the antenna, and the radio waves are reflected from obstacles and displayed on electronic instruments. From the radar electronic instrument, the driver can clearly see whether there are obstacles ahead and determine the course. Today, the word "blind flying" came into being.

2. Fireflies and artificial luminescence

The electric light invented by scientists illuminates our night. But electric light can only convert a small part of electric energy into visible light, and most of the rest is wasted in the form of heat energy, and the heat rays of electric light are not good for people's eyes. So, is there a light source that only emits light without heating? When people are at a loss, they turn their attention to nature.

In nature, the light emitted by fireflies does not generate heat, so it is also called "cold light". Fireflies emit cold light, which not only has high luminous efficiency, but also is generally soft, suitable for human eyes, and the light intensity is relatively high. Therefore, bioluminescence is an ideal light source for human beings.

Scientists have made fluorescent lamps by studying the luminous devices in the abdomen of fireflies, which greatly changed the lighting source of human beings. Now, scientists have invented cold light close to biological light for safe lighting, which is called "artificial cold light".

3. Electric Fish and Volt Battery

In addition to the well-known electric eel, there are many fish in nature that can discharge electricity. People refer to these discharging fish as "electric fish".

All kinds of electric fish have different discharge skills. Electric ray, electric catfish and electric eel have the strongest discharge ability. Where is the mystery of electric fish discharge? After the anatomical study of the electric fish by scientists, it is finally found that there is a strange power generation organ in the electric fish. These generators consist of many small plates of batteries.

The extraordinary skills of electric fish have aroused great interest of scientists. /kloc-At the beginning of the 9th century, Italian physicist Volt designed the world's earliest battery based on electric fish power generation organs.

Because this kind of battery is designed according to the natural generator of electric fish, it is called "artificial electric officer" In addition to the battery, there is another idea that is theoretically possible but technically impossible: if the power generation organ of the electric fish can be successfully imitated, then the power problem of all vehicles can be well solved.

4. Fly and gas analyzer, odor detector, fly eye lens.

Flies we hate are generally classified as pests, but their wings are natural navigators. Moreover, its eyes are a kind of "compound eyes", consisting of more than 3000 small eyes. People imitate it and make a "fly-eye lens".

It is a new type of optical element with wide applications. A "compound eye camera" is a lens composed of hundreds or thousands of small lenses, which can take thousands of identical photos at a time. This kind of camera is applied to a large number of tiny circuits in printing and plate making and electronic computers, which greatly improves the efficiency and quality.

In addition, a very strange "small gas analyzer" was successfully copied through the sensitive characteristics of flies to odor. It has been installed in the cockpit of the spacecraft to detect the composition of the gas in the cabin. Therefore, we can't absolutely define flies as pests.

5. Goose and Navigator

Migratory birds migrate for thousands of kilometers. But they can always reach the destination chosen by generations accurately. This shows that migratory birds have good navigation ability.

Scientists believe that they all have their own special sensory organs, which can use magnetic field, sun and gravity to perceive and analyze the changes of environmental factors in different regions of nature, so as to identify the direction and lock the migration route. After studying and understanding the principle of bird navigation, scientists have developed various navigation instruments, which have contributed to the development of aviation, navigation and automobiles.