Were these enigmatic ruins deliberately left behind as a haunting "clue" to our own, in many ways, still baffling existence on this planet? One clue was left in the form of an ancient, uniquely human monument of mile-wide "mega-engineering" to our own literal creation left amid a "city" of equally staggering examples of "mega-engineering pyramids" on the reddish sands of Mars-- By this same, long-vanished "Type II Civilization?

Hoagland will also discuss the startling, recent confirmations of “an ancient, high-tech civilization on Mars” — confirmed in close-up surface images from NASA’s on-going rover missions.