Language and communication was an important development during the Paleolithic period. Without it, humans wouldn't have been able to travel such huge distances, establish settlements or trade.
The Paleolithic era covered a huge time period and within that time humans developed increasingly complex tools and objects.
Our archeology professor was so old we called him Paleolithic man.
Many cave paintings from the Paleolithic period have survived in Spain and France.
The Paleolithic era was also called the Old Stone Age because humans at the time used stone to make tools and as part of tools.