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Machu Picchu: Water Problems
How did the residents of Machu Picchu get the water needed to survive in a hostile, mountainous, environment? Find out how...
(02:59)
Machu Picchu: Mountain Building
Machu Picchu is a spectacular sight, but its location meant considerable hardship for builders. Heavy rainfall and earthquake...
(02:59)
Angkor Wat
Home to more than 1 million people in the twelfth century and larger than any European Cathedral, Angkor Wat remains one of...
(00:53)
Angkor Wat: Magic Stone
Laterite, a ‘magic stone,’ was massively important in the construction of Angkor Wat, plus, we uncover the difficulties...
(03:00)
Angkor Wat: The Moat Explained
Find out why the gigantic moat surrounding Angkor Wat was so important in the construction of this ancient megastructure,...
(03:00)
Wren’s Best Building
What was Sir Christopher Wren’s best building? Find out what building trumps St. Paul’s Cathedral as his major...
(01:19)
Wren and St Paul’s Cathedral
How does St. Paul’s Cathedral compare with other cathedrals around the world? Architect Alistair Lenczner from Foster &...
(03:08)
Building Through History
Discover how the pyramids, Victorian railways and Wembley stadium are all connected. Confused? Alistair Lenczner from...
(01:19)
Earthquake
Half the world's population lives in striking distance of a major fault line. Ultimate Disaster examines key earthquakes of...
(00:54)
Volcano
Experts look at the history and power of volcanoes and ask if modern cities face annihilation in a mega-eruption.
(00:54)
Gospel of Judas
The theological implications of this important biblical document are explored by scholars and scientists.
(01:04)
The Interview
Spinal Tap’s Nigel Tufnel shares his unorthodox views about Stonehenge.
(01:46)
Spinal Tap’s Nigel Tufnel speaks about his TV viewing habits
During an interview with National Geographic to discuss the upcoming Stonehenge Decoded special, Nigel Tufnel opens up about...
(01:29)
Nigel Tufnel’s Experiments
Nigel Tufnel experiments with harmonics and a potato, while discussing Stonehenge Decoded with National Geographic.
(01:41)
Spinal Tap’s Nigel Tufnel in the Lab
Nigel Tufnel enters the lab to explore Stonehenge's mysteries. Was it used as an ancient amplifier?
(01:42)
Spinal Tap's Nigel Tufnel on why aliens didn't build Stonehenge
Watch Nigel Tufnel's unorthodox theory on how Stonehenge was built with the help of dinosaur saliva and why aliens didn't...
(01:40)
Stonehenge - The Celestial Computer Theory
Many believe that the ancient stones not only marked, but predicted astronomical phenomena. Find out why the alignments of...
(02:13)
Sexual Identity
(13:30)
Initiation Rituals
(03:24)
Gruesome Job
(03:31)