Indus Valley Civilization is one of the biggest and oldest civilizations in the world. We have been taught about this topic in our schools a lot, but even after so much research, there are two mysteries that are to date unsolved related to it. First, how did it end? And second, what language did they speak? Watch this video to find out the entire history of the Indus Valley Civilization, and why no one has been able to solve its mysteries.