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Underworld
Revealing extraordinary caves with 3D laser-scanning technology.
S1, EP5 "China"
Uncovering the secrets of China's giant caves; a team maps Cloud Ladder Hall, showing how its size creates an underground weather system.
S1, EP4 "Belize"
The team discovers why the Maya Civilization vanished; Professor Holley Moyes reveals how a drought caused the Maya to venture underground to make human sacrifices as they prayed for rains.
S1, EP3 "Slovenia"
An adventure into Slovenia's largest ice cave; the team scans the volume of ice, providing data for scientists to assess climate change.
S1, EP2 "Gibraltar"
The team learns more about the Rock's caves and tunnels; at Gorham's Cave, secrets are revealed about Neanderthal cousins and their importance to the Ancient Greeks.
