Harappan Civilization
The Harappan civilization was complex and highly planned, with streets shaped like a grid system and toilets in each home. It stretched about 500,000 sq. miles long. Harappa was found when a group of archaeologists came across a mound of sand that had stone seals with mysterious writing and burnt bricks. Harappa was built along the Indus Valley, which is located along the Indus River. At first the people of Harappa traded with each other, but after a while, they started to trade with other people. The Harappans traded timber, ivory, and beads. They received woolen cloth, silver, and tin. The Harappans believed that all animlals are holy. The rest remains to be discovered. One important piece of evidence is that the Harappan civilization went into decline after a big earthquake.