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Some surprising facts that scientists have discovered about shark behavior, focusing on the bulldog shark.
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The Americas
Tom Hanks narrates a 10-episode television event from the executive producers of Planet Earth, exploring the extraordinary worlds and wildlife of North and South America. Scored by composer Hans Zimmer, the breathtaking journey follows amazing creatures living in their natural habitats across the supercontinent, including diverse terrains like the Atlantic Coast, Mexico, Wild West, Amazon, Frozen North, Gulf Coast, Andes, Caribbean, West Coast and Patagonia. Each location comes alive in never-before-seen footage showing the unique connectedness of the land that millions of people call home.

Mutual of Omaha's Wild Kingdom Protecting the Wild
Animal expert Peter Gros and wildlife ecologist Dr. Rae Wynn-Grant highlight species under threat of extinction in the modern world and share the work of caring and compassionate conservationists, including scientists, wildlife experts and even members of the public. Gros and Wynn-Grant travel the country to explore how human activity impacts animal behavior and share how modern science, technology and other conservation techniques can help save North America's imperiled wildlife, one species at a time.

Aerial America
Some people like to hop in a car to take a road trip across America, visiting as many landmarks as possible along the way. Since such a trek can take a while to complete, taking a flight across America might be a better option for some people. "Aerial America" takes viewers on such a flight, offering rare looks at some of the nation's best-loved landmarks from high in the sky. Cameras capture the history and pageantry of America as they zoom over busy cityscapes and quiet, rural lands. Many episodes focus on a specific state, showcasing highlights of the state's beauty, while others revolve around themes such as the best small towns and natural wonders found in the country.

The Humboldt Current
The Humboldt Current is part of a much larger system, the South Pacific Gyre, with the equator as its uppermost limit.