In my generation, there are fewer and fewer mammals, and the "Muroidea", which lives underground and is highly fertile, is one of the lucky animal groups that are still alive in the world. They are widely distributed on all continents except Antarctica and can be found in almost every country in the world.
Among them, "Hamster" looks more cute, and humans once regarded them as pets. Set up rollers in their cage and they'll happily run around.
In the eyes of humans, the roller is a toy for hamsters, but in fact, it is a very important item for the health of hamsters. Every hamster loves to run, and the rollers are just the right way to release stress. If not, the probability of hamster suffering from cage paralysis and then death is very high.
And now I am crawling around in this "Magic Cube", am I also being regarded as a hamster by some force? If you don't exercise, you will die soon?
However, I and hamsters are clearly two species.
The role of hamsters on earth can also be regarded as a situational animal. They can be human's palm treasures, can also become underground mud in the laboratory, and can become human killers.
In every highly contagious world pandemic, there has always been a murine viral vector that wiped out some portion of the human race.
Hamsters happen to be one of them, so no one treats them as pets anymore.
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