The document provides an overview of what is known about the past in India from various historical sources. It discusses how early humans lived as hunter-gatherers along rivers like the Narmada and how around 8000 years ago in the Suleiman and Kirthar hills, people began growing crops like wheat and barley and domesticating animals. It describes how the earliest cities developed around 4700 years ago along the Indus River valley. It explains that manuscripts, inscriptions, and archaeology are the main sources used by historians to learn about the past. The document also notes that there are many pasts rather than just one, as histories varied between different communities. It defines BC and AD time measurements.