You may not cross over solid double yellow lines unless .

Two solid yellow lines mean that neither lane of traffic can cross the lines unless they are turning (if it is safe to do so). No passing is allowed.

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.