The horror is average, I care about cave people

Thinking of the original piton one hundred years ago, will it be the descendants of those explorers one hundred years ago, and after a hundred years have evolved into the appearance of today's underground people? One hundred years is very long for an individual, but for a long evolutionary history, the short is almost negligible, so this inference should be wrong. But if a group of monkeys went underground and evolved into what they are now, it's impossible to say, because since they have evolved underground, they don't need to walk upright, so it's impossible to evolve their limbs that resemble humans, so this doesn't hold true. So, is it the descendants of ancient explorers, these people are much earlier than those a hundred years ago, there should only be Indians in the ancient American continent, and some of them were trapped underground for some reason. For food, after thousands of years, they can become the image they are today. Later, although they found a way to the ground, they have already formed the habit of underground life, so they no longer need to evolve. It's like human beings are used to living on the ground.
Haha, it's just a movie, I'm a little bit curious about it.

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