Mayan pyramid researchers, KRISTI BASS and JARED MURPHY, return to give us updates on their latest expeditions. They were using LiDAR to reveal undiscovered ceremonial structures. Was their empire much larger than previously thought? They have been working with many locals. How what is the status of international cooperation? Jared has also explored the Grand Canyon looking for Kincaide's Cave, and we'll touch on his book "It's Not Aliens, Worse, It's Us." They will give us great insights into ancient engineering.
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