That's more than enough information, thank you! :)

ok, I changed the question. I really just was wondering how that could be, because as I studied the cell, this question came to me, and my teacher couldn't give me an answer. Thank you for the link!

I think that through hunting all the time the ability of communication was more and more important. A failure of understanding could have ended in a disaster. Through communication they organised themselves and looked for the best way to hunt in group. Because of this they could have been thinking how to hunt better and, to work in a group the best way, how to be better in order to provide better understanding (social intelligence). Couldn't that be a possible way how this has evolved?