70,000 years ago : Out of Africa Migration

70,000 years ago: Out of Africa (OOA) migration starts. First homos (most likely homo sapiens) from Africa journeys to Asia and Arabian peninsula. Over the next thousands of years this first sapiens populated the whole of non Africa world bringing to bear a new horizon in our special planet - a new wave of erect walking, tool using, hairless, intelligent species. 16,000 years ago finally they populates Americas. 

First Indians as we know today, are part of these OOA migrants, passing through Arabian peninsula before reaching India and then moving on to China and as far away as Australia. Approximately 50-60,000 years ago they would have populated Indian peninsula. They likely met, around the shores, many homo species but likely no homo sapiens. These homo species were using stone tools well before the Africans reached Indian shores - but likely these Hominins were less intelligent and less sophisticated. They probably made love to each other creating the first diversity in Indian subcontinent.

There is of-course a debate around whether the modern humans OOA migration into India happened much earlier (pre-Toba volcanic eruption). There is increasing evidence of the same in recent works.