10 interesting facts that are not taught in school (11 photos)

Curiosity and self-education are important aspects of our development. School gives us basic knowledge, but there are interesting facts that you won't find in textbooks. In this post, you will learn fascinating information for developing erudition.





1. It is estimated that on average a bat makes 1100-1300 attacks on flying insects during one hunt, and can eat so many insects in one night that they make up more than a third of its own weight



Over the years of observation, researchers have come to the conclusion that without bats, there are about three times more insects on tree seedlings, and the seedlings themselves lose pests are about five times more numerous than leaves.

2. Dogs and cats spin before sleep because it is a genetic legacy of their wild ancestors





Their survival instincts force them to tune into the wind direction to detect the scents of predators and choose the best angle to monitor their surroundings.

3. During World War I, Nobel Prize-winning physicist Marie Curie developed mobile X-ray stations



Then, with the help of the Red Cross, Curie equipped twenty more X-ray machines. Mobile X-ray stations traveled around hospitals, helping surgeons perform operations. During the war, Marie and Irene Curie and the people they trained took more than a million X-rays of wounded soldiers.

4. Icelandic horses are prohibited from being exported from the country. Otherwise, they will not be allowed back in



It is also forbidden to import horses from abroad to Iceland - the corresponding law has been in force in the country since 982. This is done not only to preserve the purity of the breed, but also to protect against foreign diseases.

5. Scientists believe that Neanderthals were quite highly developed



Thus, the tools found at their sites were often superior in quality to the tools of Homo sapiens. Moreover, skeletons of people with signs of broken bones have been found that up to 70 percent of the fractures were skillfully repaired. They used tools, had social structures, thrived in hostile environments, and had relatively long lifespans.

6. Every fall, Katmai National Park in Alaska hosts "Fat Bear Week"



Reserve specialists select 10-12 brown bears each year and post two photos on the site: one taken in mid-July and one in early September. People can choose which animal has fattened up most successfully for the winter. The goal is to promote the park and promote wildlife conservation.

7. Grasshoppers appeared before grass. They are the oldest living group of gnawing herbivorous insects, they appeared about 250 million years ago



8. Japan burns some of its waste and uses the ash to build new islands



This is how the eastern part of the artificial island of Odaiba and other artificial islands in Tokyo Bay were built. Kansai Airport in Osaka Bay is also built on a completely artificial island.

9. Special nerve endings on the legs of elephants are able to detect various types of vibrations emitted by their relatives. True, they can hear with their ears, but poorly



When African elephants stamp and trumpet in fear when a predator approaches, other elephants at a distance learn the information by perceiving the shaking of the ground. The fact is that the stamping resonates at an ultra-low frequency of 20 hertz, which people hardly perceive, but elephants easily detect vibrations under their feet.

10. Serotonin, the happiness chemical, can be toxic. It is a chemical that transmits brain impulses between nerve cells. When injected into the skin, it causes severe pain and is one of the main components of wasp venom