Almost everyone who has read a book has read a story called "farmer and snake". The story is that long, long time ago, a kind farmer saw the snake frozen in the snow, so he put it in his arms to keep it warm, and finally "woke up" the snake. However, instead of thanking the farmer, the waking snake bit the farmer to death. Many people sympathize with the farmer and think that the snake "takes revenge instead of gratitude". So why did the snake bite the farmer regardless of good and evil?
In fact, from the perspective of zoology, this is a scientific problem. Snake is a scaled animal in Reptilia, which is a kind of variable temperature animal. When the temperature is low, the snake can not maintain the appropriate body temperature, the enzyme activity in the body will be reduced, and it can not continue to maintain its basic life activities, so the snake will enter hibernation. Hibernation can reduce the speed of body metabolism, reduce energy consumption, and make snakes lose the ability to defend against natural enemies.
When the snake just enters the hibernation period, its body has sufficient nutrition. With the increase of hibernation time, the nutrition in the snake is gradually consumed and begins to be hungry. It was a hungry snake that the farmer "woke up". Therefore, the snake bites the farmer is an instinctive reaction, which may mistakenly regard the farmer as the food to be hunted or the natural enemy to attack. As a result, the farmer unfortunately became the object of "vengeance".
The farmer's practice seriously violates the laws of nature. To "wake up" a hibernating snake, the result is that it is killed by the snake. In the process of study and practice, we should not only know the nature, but also know why. Even if we do good deeds, we should follow the laws of nature.