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25 facts about rats
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1. Rats appeared on Earth 48 million years earlier than men.
2. On average, for every person on the planet has to 2 rats.
3. If your mouse to increase human growth and straighten a skeleton, it would appear that the joints of mice and men have the same structure, and the bones have an equal number of parts.
4. In the Middle Ages in Europe, at the direction of one of the bishops of the rats were excommunicated.
5. A rat can swim 3 days in a row, swim a few kilometers (fixed record - 29 km) and drown if he finds out possibilities.
6. gray rats are capable of moving at a speed of 10 km / h, jumping up to a height of 80 cm, and an aggressive state - up to 2 meters in height.
7. In rat heart pulsates at a rate of 500 times per minute, the house mouse heart beats 700-750 times a minute.
8. Finer hairs that cover the tail of the rats used in ophthalmology in operations on eyes.
9. Rats dive well and perfectly climb ropes, pipes, trees. The day the rats are able to overcome the 10 to 50 km.
10. rat teeth grow all his life, so they are always something gnaw to their sewing.
11. Rat easily gnaws solid substance such as concrete and metal.
12. Rats emit whistling in the ultrasonic range, which enables them to communicate with each other without attracting the attention of predators. And they are not whistling lips, and throat. They are also able to suddenly change the frequency of the signal.
13. In the rat - a rich vocabulary screams with special values.
Rat at the time of stress produces a sound volume equivalent of running pneumatic hammers, though due to the fact that it has an ultra-high frequency, the man did not hear.
14. Rat takes only 50 milliseconds to understand where is the smell.
15. Rat feels the X-rays of the brain that controls the olfactory organs.
16. Rat annually consumes about 12 kg of food, but it is incomparable with the amount of food she makes unusable. Statistics show that one in six people do not feed the farmer and rats.
17. The rats are able to distinguish poisonous food from normal even when the concentration of the poison - one part per million.
18. A rat can live without water longer than a camel, and in general the longest mammal.
19. Rats maintained very high levels of radiation, but can die from shock or prolonged mental stress.
20. Rat - the only mammal, other than a person who knows how to laugh.
21. Rats also have dreams.
22. Rat family owns a plot with a radius of about 150 m.
23. The scientists have put forward the theory that rats could cause the extinction of the dinosaurs. Rats - lovers eggs - massively sucked the contents of dinosaur eggs, thereby stopping the continuation of their species. This seems to be true, because in our time in Ireland, the rats ate all the marsh frogs.
24. During the Great Patriotic War during the bombing of the people were hiding in houses, who ran in the rat.
25. In Illinois, under the threat of a fine of $ 1000 "prohibits a baseball bat to beat the rats».
A selection sent: zhuraeva
Source: mai.animalworld.com.ua
via factroom.ru
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