The Evolution of Language

We don't know when speech emerged and we don't know how human beings uh Communicated before so one of the evidences we can look into how did humans communicate before speech was a thing because clearly Beyond a certain time period. I'm sure humans did not have the ability to speak and there was no language. Look at our closest primate cousins The chimpanzee is the gorillas the bonobos the orangutans the gibones, etc. They don't like speech Yeah But they do communicate with each other It takes this much time for species to Develop the ability to speaking in our case. We are the only species As far as we know in human on the earth's history that