Mia is attracted to a man she is chatting with in a nightclub. what is probably happening to her eyes?

Probably, what happened to Mia's eyes is that her pupils are dilating that is why she was attracted to the man he was chatting in a nightclub. According to studies, it have shown that our pupils dilate wider than normal when we are excited about something and even someone. 

During the paleolithic, hominins grouped together in small societies such as bands, and subsisted by gathering  plants  and fishing, hunting or scavenging wild  animals. the paleolithic is characterized by the use of knapped stone tools, although at the time humans also used  wood  and bone tools.