A reimagining of life in Lothal 4,000 years ago, satellite images of the town in context of today's landscape, and the discoverer, S. R. Rao's drawings of the town plan, bead factory and warehouse. "While exploring the Sabarmati estuary an ancient mound presently known as Lothal was discovered in November, 1954," wrote S. R. Rao. "The excavation conducted here during the following seven years has brought to light the existence of a flourishing port-city of the Indus Civilization with an excellent brick-built dock and nearly laid-out streets.

The first images of the announcement of the discovery of the ancient Indus Valley civilization in the Illustrated London News, on September 20, 1924. "The remarkable discoveries here illustrated put back by several centuries the date of the earliest known remains of Indian civilization. In his deeply interesting article describing them (on page 528) Sir John Marshall compares them to the work of Schliemann at Tiryns and Mycenae, where likewise it fell to the archaeologist to break new ground and reveal the relics of a long forgotten past.

Whether or not the recent new pushing back ancient Chinese civilization thousands of years is true or not, it is likely that the origins of all ancient civilizations will be pushed back in the years to come. We know very little about possible antecedent cultures, whether in Rakigarhi, Balochistan, southwestern Iran or northern China.

It is hard to underestimate the importance of the wheel to ancient Indus civilization. All indications are that it was an indigenous development, pursued in flat agricultural areas, and probably preceded that other great wheel - pardon the pun - of change, the potter's wheel.