Acurrency shared by several countries in europe is the euro

True. The currency in question is the Euro.

The answer Euro is already in the question.

If that's not what youre looking for, then the answer is the European Union, which uses the same currency, the euro, to create a shared/free market.

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.