Do Christians believe in cavemen?

I am a new christian and still trying to clear my beliefs. Something that always confuses me is cavemen. One example: the Bible says God gave us different languages so we wouldn't be as powerful as him. Yet science and history shows that cavemen did not have a real language and over time people developed a way of communicating with each other. It's all so confusing and I was hoping someone could clear it up for me. thanks in advance