Chance discovery of Harappa and Mohenjodaro in 1920s, as a result of the railroad building activity, revealed a lost but mature civilisation. Sir John Marshall, leading the excavations at that time, named it as the Indus Valley Civilization because these two ruined cities were located on the banks of the Indus river and its tributary, Ravi. Discovery of Harappa type ruins at Ropar in the Indian side of Punjab, soon after partition, proved that the Indus Valley Civilasation was more extensive than originally thought. This, and some similar finds in quick succession, started a competition, perhaps the only healthy one, between the Indian and Pakistani archaeologists for the search for Indus valley civilisation sites.
In the process, more than 1400 sites containing the Harappa like artifacts have been discovered and more are still being revealed. Two third of these sites are located on the Indian side the remaining one third are located on the Pakistani side of the border. Prominent among these sites are Guneriwala in Pakistan, Manda in Jammu and Kashmir, Ropar in Punjab, Banawali and Rakhigarhi in Haryana, Alamgirpur near Meerut, Kalibangan in Rajasthan, Lothal, Dholavira and Surkotada in Gujarat and Daimabad in Maharashtra. When plotted on the map, these sites seem to crowd around the dry bed of river Ghaggar in Punjab, Haryana and Rajasthan, and rivers Hakra and Nara in Bahawalpur and Sind in Pakisstan, and ending in the Rann of Kutch in Gujarat. Ghaggar is called Hakra when it enters Bahawalpur in Pakistan and continues as Nara in the Sindh province.
The artifacts recovered from these Harappan sites confirm the description of the professions followed by the Sarasvati valley people of the vedic times. Their professions included agriculture, weaving, animal husbandry and pasturing, metalworking, pottery, beads manufacturing and gold and silver working. At the Lothal site, a huge dock capable of handling ocean going and river navigation ships has been excavated. Some donut shaped stone anchors have also been found at Lothal and other sites indicating internal and external maritime trade. A visitor to the photo exhibition of the Harappan sites, held at Chandigarh recently, was visibly impressed with the evidence of town planning, brick structures, water management and drainage. He wondered loudly as to how much more time is needed for the modern Indian cities to achieve the sophistication of these ancient sites.
Harappan sites match the Vedic description of the Sarasvati valley people, and these sites are concentrated around the dry bed of Ghaggar river, which is also being recognised as the dry bed of the river Sarasvati. The combination of archaeological evidence on the ground, and satellite imagery from space would place the extent of this civilisation at approximately one and a half million square kilometers – the largest among the contemporary civilisations like Sumer and Egyptian. Considering the evidence gathered so far, it is more appropriate to rename the Indus Valley Civilisation as Sarasvati – Sindhu Civilisation. This civilisation was so much dependent upon the river Sarasvati that it was ill prepared to survive its loss. Losing their means of subsisdence as the river started drying, the population started migrating to east and south to settle on the banks of rivers Ganges, Yamuna, Godavari, Krishna and Kaveri. This fact truly justifies the Rigveda title of Ambitame – the best of the mothers – for the river Sarasvati.