In this world, the viability of rats is probably one of the best. They are so varied and numerous that they can be eaten and drilled anywhere. In the process of "fighting" with rats, humans often lose. But some of the tenacious rats will commit suicide en masse, are they really impatient to live? This rat that commits mass suicide is called the Nordic lemming. Lemmings live mainly in cold regions such as northern Europe, northwestern America, and northern Asia, and look a lot like voles. Like other rodents, they reproduce very quickly. Lemmings living in northern Europe flock to the sea every 3 to 4 years. They don't go to the sea to play; even if they can swim, they can't fight the sea.
People can often see the whole process of lemming mice throwing into the sea, and the scene is very tragic. This was encountered in 1868 by a ship on the Norwegian Sea. The ship was blocked by the lemmings thrown into the sea, unable to move, and the people on board witnessed this tragic scene with their own eyes. I saw countless lemmings scrambling to jump into the sea, some of them could not move when they jumped into the sea, and some of them could still flutter a few times, but soon drowned. The lemmings in front of them fell, and the lemmings in the back would immediately rush forward on their corpses, but they would not last long. Soon, the surface of the sea was black and pressed, full of the corpses of lemmings. Witnessing this tragic scene, I wonder if the mood of those viewers is excitement, compassion, or horror?
Why do Nordic lemmings stage such a rat tragedy every 3 to 4 years? Why do lemmings elsewhere never "commit suicide"? Everyone has this question, and scientists are particularly interested in solving the mystery.
Some people explain it this way: In ancient times, there was an ancient land called Daxizhou, which is located in the subtropics, with four seasons like spring and abundant products. Later, the sea and land changed, and this rich western continent sank. Before the sunken continent of Great Western, because of the lack of food on the nordic land, the ancestors of the Nordic lemmings would swim across the sea and go to the Great Western Continent in search of food. At that time, the Baltic Sea and the North Sea were much narrower than they are now, so lemmings had the ability to swim across the sea. This claim is based on the fact that archaeologists have found fossils of ancient Norwegian lemmings south of the British coast. But later, the Great Western Continent has disappeared, and the lemmings have been obsessed, following the footsteps of their ancestors, thinking that the other shore is the promised land, and ended up buried at the bottom of the sea.
Some scientists believe that more than 10,000 years ago, the ice floes in the Arctic Ocean once froze into a large ice sheet that did not change for many years. Many plants and animals have made their homes on the ice fields. Nordic lemmings may also live on this ice oasis. But years later, due to climate change, the ice and snow melted, and the ice field continent gradually collapsed and disappeared, leaving only some small islands, and the lemmings that jumped into the sea still retained the instinct to migrate, thinking that the ice field continent of that year still existed. Other ecologists believe that lemmings thrown into the sea are related to their super reproductive ability. The viability of the Nordic lemming is so strong that a female lemming can give birth to at least 10 mice a year, and these mice will grow up in 42 days and can give birth to mice again. After 3 to 4 years, their children and grandchildren are many, many more. But the living space is limited, in order to avoid hunger, they flock to find food, and their limited minds make them think that the sea is the small river and ditch they usually sneak around, so they jump down, maybe until the moment of death, they do not understand what this is all about!
Of course, these claims are only speculations, and scientists continue to explore. After reading these speculations, are you satisfied or not?
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