“Land of the Eagle” turns the clock back to reveal the continent as it used to be hundreds of years ago, seen through the eyes of Native Americans and white settlers. Through their writings and diaries, Peter Crawford's award-winning series recreates the landscapes and wildlife of North America at the time when the first Europeans came to this 'new world’. This film explores the Sonora Desert of Arizona, where plants and animals have adapted...

Earth has got swirl. The air in the atmosphere swirls. The water in the ocean swirls. But what does it all have to do with weather and climate? To answer this, we’ll have to get a close-up on all that swirl. Don’t worry, being dizzy is fun! Topics include: Earth's Place in the Universe; Investigating Earth's Past; Restless Earth; Mountains, Volcanoes, and Earthquakes; Energetic Earth; Atmosphere and Oceans; and Earth Systems.

Water covers most of our Earth’s surface area. In this program, we’ll discuss the characteristics of the sea and its impact on climates and coast lines. Topics include: Marine Plants, Sea Water Characteristics, Ocean Currents, Sea Water Temperature, Wave and Tide Formation, Tsunamis, The Sea Bed, and Underwater Gas and Petroleum Deposits.

In the 2007-2008 winter season alone, 52 people died in avalanches in the U.S. and Canada, and more than double that number worldwide. As more and more people head into to unpatrolled backcountry these numbers are on the rise. In this episode, Tim Samaras will bring his expertise and tools to try and measure the forces inside an avalanche - how it accelerates, what g-forces it creates and how it buries its victims. He hopes the data he collects can...

What really happens when 30 million volts of electricity charges through your body and you survive being struck by lightning? Now, meet survivors who live to tell their tale of being hit by a force that is faster than a speeding bullet and five times hotter than the sun as Explorer unravels the science behind one of nature's most mysterious phenomena. Using revolutionary brain imaging technology and 3-D CGI, NGC travels inside the human body along...

What are the different types of rocks and how do they change form? This question is answered by examining the rock cycle. The major characteristics of igneous, sedimentary, and metamorphic rocks are highlighted through vivid footage and colorful animations. The video demonstrates the ways the following processes transform rocks into other rocks: weathering, erosion, deposition, compaction and cementation, melting, heat, and pressure. Important terminology...

X-Ray Earth reveals a vast fault 80 miles off the Pacific Northwest coast. For more than 300 years, pressure has been silently building. When it slips, it will generate a megaquake and a tsunami that will devastate the region, threatening the lives of 15 million residents. Now scientists are racing to understand how bad the destruction will be when the “big one” hits.

In this video, storm chasers seek out tornadoes to learn more about them. Find out which conditions are conducive to the formation of tornadoes and why scientists are still seeking answers about these mysterious storms.

Dallas Campbell strips away the surface to reveal a hidden Britain as you've never encountered it before.

Floods in the United States result from a variety of causes, including: rainfall, snowmelt, tsunami, hurricanes, landslides, mudflows, or failed dams and levees. Watch as some of these causes are illuminated during a review of famous floods in New Orleans and along the Mississippi River.