The secrets of the Indus Valley stretch back millennia, locked away in symbols no one has cracked. This video dives into the latest theories and finds surrounding this ancient civilization.

For 150 years, people have tried to decipher mysterious symbols written by an advanced civilization believed to rival ancient Egypt. Can a $1 million prize help crack the puzzle?

It is a riddle that has confounded scholars for over a century. And now it carries a handsome cash prize: $1 million for anyone who can decipher the script of the ancient Indus Valley civilization.