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Restoring the American Prairie Channel: National Geographic Channel Length: 0 Date: April 16, 2010 Conservationists work to restore the vast, open spaces that Lewis and Clark once explored on America’s living prairie.

The American Prairie Reserve Channel: National Geographic Channel Length: 0 Date: April 16, 2010 The American Prairie Reserve is one of the U.S.'s largest conservation efforts in history.

Frankenstein Ski Lift Channel: National Geographic Channel Length: 0 Date: April 15, 2010 In Cody, WY, Sean Riley helps resurrect a ski lift out of the spare parts of retired lifts from around the country.

The Expanding Universe Channel: National Geographic Channel Length: 0 Date: April 15, 2010 It’s possible that the 'dark energy' that feeds the expanding universe could one day rip the planet apart.

'Space is Really Really Big' Channel: National Geographic Channel Length: 0 Date: April 15, 2010 In the 90’s, scientists discovered the Kuiper Belt and realized that the solar system is a lot bigger than we once thought.

Remains of the Stone Age Channel: National Geographic Channel Length: 0 Date: April 15, 2010 Archaeologists find relics of the Mesolithic Era deep in Danish waters. What do they tell us of our Stone Age ancestors?

Lost World of the North Sea Channel: National Geographic Channel Length: 0 Date: April 15, 2010 Dropping sea levels 300 ft, a huge land mass connects Britain to the rest of Europe. This is Doggerland — a Stone Age Atlantis.

Brutus Likes Cookies Channel: National Geographic Channel Length: 0 Date: April 14, 2010 Brutus certainly has a bear-size appetite, especially for Christmas cookies!

Expedition Wild: Outtakes Channel: National Geographic Channel Length: 0 Date: April 14, 2010 Sometimes it requires more than one take to make it all work.

Calming the Killer Instinct Channel: National Geographic Channel Length: 0 Date: April 10, 2010 A Shar Pei has a bad history with small dogs. Can Cesar drain some of Leo’s fighting energy?

Image Conscious Tudors Channel: National Geographic Channel Length: 0 Date: April 09, 2010 Jousting was perfect for showing off his Henry VIII’s strength, but it put his health and his life at risk.

The Body of Henry VIII Channel: National Geographic Channel Length: 0 Date: April 09, 2010 Look into the body and mind of one of the world’s most notorious monarchs: Henry VIII.

The Invention of Time Channel: National Geographic Channel Length: 0 Date: April 09, 2010 Our daily lives depend on the celestial observations of our human ancestors.

Cesar Down Under Channel: National Geographic Channel Length: 0 Date: April 08, 2010 Cesar Millan goes international, heading to Australia to help owners with their dog problems.

Lightweight Powerhouse Channel: National Geographic Channel Length: 0 Date: April 08, 2010 The Audi R-8’s aluminum body makes this super car light, strong and safe.

Creating the Audi R-8 Channel: National Geographic Channel Length: 0 Date: April 08, 2010 Audi brings a road version of its race car to the people.

Ancient Astronaut Theory Channel: National Geographic Channel Length: 0 Date: April 08, 2010 Is it possible that extraterrestrial beings visited our ancient ancestors?

Making an 'Incredible Bomb' Channel: National Geographic Channel Length: 0 Date: April 08, 2010 WWII combatants race to build the first atom bomb, and the fate of mankind hangs in the balance.

Sloth Sleep Study Channel: National Geographic Channel Length: 0 Date: April 08, 2010 Scientists study the sleep habits of sloths in the wild in order to learn more about humans' need for sleep.

Secret Lives of Sea Turtles Channel: National Geographic Channel Length: 0 Date: April 08, 2010 A female sea turtle crawls ashore to lay her eggs, revealing one of the many mysteries of loggerhead sea turtle life.

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