Across Asia, archaeologists search for traces of a lost civilization—one that may have rivaled Mesopotamia and Egypt but vanished without a trace.

Some believe it lies beneath the sands of the Taklamakan Desert, others in the depths of the Indian Ocean.

Could it be an unknown ancient empire, or a missing link in history? And it’s not the only mystery, undeciphered scripts, lost cities, and ancient tech defy explanation. What secrets are waiting to be uncovered?