Cave paintings from the early stone age exist, as do late stone age sites, copper tools and the heavy influence of the Iron age as well. However this area of India is one of the few that does not contain any discovered remains of ancient grave sites. The Harrapa peoples or the Indus River Civilization also did not extend to within Bihar's borders. Normal ancient Indian culture and civilization starts during the Aryan times, and some of the markers of Aryan advancements such as
Sanskrit, the spoken language