Why do people look so different, but animals of the same species basically look the same?

In fact, I feel that human beings are not much different. They all have two eyes, a nose and a mouth. But animals are difficult to distinguish, I think it is mainly because of different genes and different cell arrangements.

Moreover, because human beings are advanced animals, their gene sequences are more complex and diverse than other animals, so there are more internal and external differences. The lower the animal level, the harder it is to tell! The same is true of single-celled animals.

But bad things are like dogs seeing us! This way of thinking is a typical "behind closed doors" thinking, and it is easy to draw conclusions according to your own feelings. You can be bold, because there are many people with different skin colors in the world. For many people of the same species, such as blacks, the difference is very small, which means that "animals are all the same"!

For example, many people, especially those who don't know basketball, are basically black and look alike, and they don't know who they are when they watch NBA games. Of course, if you are familiar with the NBA, it is different. You can tell what a superstar it is at a glance! Animal eyes can easily distinguish children from animal eyes. This will be incredible in our eyes. For example, a flock of sheep look the same. Why can a mother know her children at a glance?

There are still obvious differences between descriptions, but you can't measure other races with other people's ideas! This is why there is nothing special about human beings. Of course, appearance is not special. All species on earth are the result of long-term evolution. Even if the same thing is the result of natural selection, it doesn't mean anything!