Harappa, The Lost World
The Indus Valley Civilization (also known as the Harappan culture) has its earliest roots in cultures such as that of Mehrgarh, approximately 6000 BCE. The two greatest cities, Mohenjo-daro and Harappa, emerged circa 2600 BCE along the Indus River valley in Punjab and Sindh. The civilization, with a writing system, urban centers, and diversified social and economic system, was rediscovered in the 1920s after excavations at Mohenjo-daro in Sindh near Larkana, and Harappa, in west Punjab south of Lahore. A number of other sites stretching from the Himalayan foothills in east Punjab, India in the north, to Gujarat in the south and east, and to Balochistan in the west have also been discovered and studied. Although the archaeological site at Harappa was damaged in 1857 when engineers constructing the Lahore-Multan railroad (as part of the Sind and Punjab Railway), used brick from the Harappa ruins for track ballast, an abundance of artifacts has nevertheless been found. The bricks discovered were made of red sand, clay, stones and were baked at very high temperature.