Secrets of the Sky Tombs
About the Episode
Evidence discovered in the world’s highest tombs reveals ancient rituals and beliefs.
Aired:
01/03/17
| Expires: | Runtime: 28s
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Extras
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Fossilized Dung Reveals Clues About Dinosaurs' Diet
Where are you going to get protein if you're an herbivore?3:06 -
Can South Carolina's Salt Marshes Be Saved?
Many seafood dishes depend on an ecosystem that's easy to overlook: The salt marsh.8:27 -
Japan's Killer Quake - Preview
An eyewitness account and investigation of the earthquake, tsunami, and nuclear crisis.0:30 -
Hunt for the Supertwister - Preview
Airs Wednesday, May 9, 2012 at 10:00 p.m. ET/PT. Check your local listings.0:30 -
Crash of Flight 447 - Preview
Airs Wednesday, June 13, 2012 at 9:00 p.m. ET/PT. Check your local listings.0:30 -
How the Morpho Butterfly Gets its Iridescent Color
How does nature produce a color that looks so unnatural?2:22 -
Stopping the Millennium Tower from Sinking Further
How can skyscrapers be built safely without a foundation on bedrock?3:28 -
When Earthquake Damage is Invisible
Factors such as inadequate construction materials can make tall buildings vulnerable.2:51 -
Secrets in the Scat Preview
Join biologists on an ingenious hunt for the clues hidden in animal poop.0:30 -
Arctic Sinkholes Preview
In the Arctic, enormous releases of methane, a potent greenhouse gas, threaten the climate0:30
