The Lost City Of Harappa(Pakistan)

Harappa was a city in the Indus civilization that flourished around 2600 to 1700 BCE in the western part of South Asia.

HISTORY:One of the most fascinating yet mysterious cultures of the ancient world is the Harappan civilization. This culture existed along the Indus River in present day Pakistan and India. It was named after the city of Harappa as it was the first of that civilization's cities discovered. Harappa and the city of Mohenjo-Daro were the greatest achievements of the Indus valley civilization.These cities are well known for their impressive, organized and regular layout, road and street networks, drainage and step-wells for water. Over one hundred other towns and villages also existed in this region. The writing system of the Indus Valley Civilization, evinced in numerous seals, pottery graffiti and a probable sign at Dholavira, remains undeciphered.

DECLINE AND FALL OF HARAPPAN CIVILIZATION:There has been much speculation on the decline and fall of this civilization. The decline of the Harappans was gradual at first and may have come to a very abrupt termination later on[6]. In the period of climate history coinciding with the decline of the Harappans, a significant change in the global climate took place by the expansion of arctic air. This may have been responsible for such things as drought in northern Iowa, affecting the Mill Creek Indians, and in Greece, affecting the Mycenaeans[7]. It may have contributed to the fall of the Harappans as well.[8]
Another possibility is an invasion from the Aryans, who inhabited the region of present day Northwest India.