Indus valley civilization.

http://www.dailymail.co.uk/sciencetech/article-3285143/The-mystery-lost-civilisation-Researchers-say-closer-unravelling-secrets-Indus-people.html

PS

In the early 1920s, the British Archaeologist, Mortimer wheeler unearthed this in the North-west of India. The prevailing theory of the origin of Indian civilization was that 'Aryan hordes' riding horses invaded, conquered uncivilized tribes and  gave their culture to present India. This fitted well with the 'Aryan supremacy' theory of the British governing classes. Mortimer Wheeler's findings upset these theories. He showed that there was already an advanced civilization in India. Recent DNA findings of the Indian population confirm these findings.

PGV