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BIG ENCYCLOPEDIA FOR CHILDREN AND ADULTS
What is the most dangerous animal that has ever lived on our planet? Detailed answer
Directory / Big encyclopedia. Questions for quiz and self-education Did you know? What is the most dangerous animal that has ever lived on our planet? A good half of the people who have died in the history of mankind - something like 45 billion - were killed by female mosquitoes (males only bite plants). The mosquito (or mosquito) carries over a hundred potentially deadly diseases, including malaria, yellow fever, dengue, encephalitis, filariasis, and elephantiasis (elephantiasis). Even today, every twelve seconds, this insect kills one of us. Amazingly, until the end of the 1877th century, no one could have thought that mosquitoes were so dangerous. It wasn't until XNUMX that Dr. Sir Patrick Manson - also known as "Mosquito" Manson - proved that elephantiasis was caused by mosquito bites. Seventeen years later, in 1894, Manson had the idea that mosquitoes might also be the cause of malaria. He invites his student Ronaldo Ross - at that time still a young doctor practicing in India - to test this hypothesis. Ross was the first to show how a female malaria mosquito transmits the Plasmodium parasite through her own saliva. He tested his theory on birds. Manson outdid the student. To demonstrate the work of the theory, he infected his own son - using malarial mosquitoes, which he brought from Rome in diplomatic luggage. (Fortunately, after an immediate dose of quinine, the boy recovered.) In 1902, Ross received the Nobel Prize in Medicine. Manson is elected a Fellow of the Royal Society and knighted. He also becomes the founder of the London School of Tropical Medicine. To date, 2500 species of mosquitoes are known, 400 of which are members of the Anopheles family, and 40 of them are capable of transmitting malaria. Females lay their eggs in water and use the sucked blood to mature them. The eggs hatch into aquatic larvae, or pupae. Unlike most insects, mosquito pupae, also known as "twitchers", are very active and can glide through the water quickly. Male mosquitoes buzz in a higher tone than females; they can be seduced by an ordinary tuning fork that strikes a B note. Female mosquitoes are attracted to moisture, milk, carbon dioxide, body heat, and movement. Sweaty people and pregnant women are much more likely to be bitten. In Spanish and Portuguese, the word mosquito means "small fly". Author: John Lloyd, John Mitchinson
Does a rattlesnake rattle before attacking? The rattlesnake is one of those who should be feared. And because people are afraid of her, they made up the story that the snake rattles its tail before biting, thus, as if considering it a little less dangerous. Unfortunately, this is not always the case. When a rattlesnake rattles, it usually indicates that it is frightened. This causes her tail to vibrate rapidly, so that it seems to rattle. But a study of rattlesnake behavior has shown that 95 times out of a hundred, it does not give any warning before the attack! By the way, the idea that a rattlesnake, and not only it, attacks more readily than it bites, is also not entirely true. In fact, venomous snakes both attack and bite, but some do it more often than others. The long hollow venomous teeth of snakes such as the rattlesnake are movable and point inward against the palate of the mouth when it is closed. When the snake is about to attack, it opens its mouth, the teeth take a fighting position, and the snake rushes forward. As soon as the teeth dig into the victim, she stings. When bitten, poison flows out of the poisonous glands, it passes through the cavity of the teeth and enters the wound. In other snakes, such as the cobra, which have short teeth, the bite is not lightning fast, but lasts for some time, and it seems that they are chewing. With this chewing movement, the snake releases poison into the wound. But there is no doubt that the cobra is much more dangerous than the rattlesnake. She is much more aggressive, more willing to attack. And although the rattlesnake has more poison, the cobra has more deadly. A man bitten by a cobra dies in less than an hour!
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