Nature

Airs: March 11 at 9:00 PT/9:00 ET
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BBC AmericaBBC America continues the nature theme with 24 Hours on Earth, an exploration of how plants and animals handle the 24-hour cycle, at 9:00.  No, it’s not the 24 hour news cycle.

Airs: March 18 at 9:00 PT/9:00 ET
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BBC AmericaThe first season finale of 24 Hours on Earth, an exploration of how plants and animals handle the 24-hour cycle, is on BBC America at 9:00.

Aerial America
Airs: September 07 at 9:00 PT/9:00 ET
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Smithsonian ChannelIn honor of the fiftieth anniversary of the signing of the Wilderness Act of 1964, the Smithsonian Channel is airing Aerial America:  Wilderness, a look at the land covered by the Act, at 9:00.

 

Airs: April 22 at 8:00 PT/8:00 ET
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National GeographicToday is Earth Day and National Geographic Wild has Africa’s Wild Coast, a documentary about efforts to protect Gabon’s rich coastal waters which are under attack from illegal trawling, putting humpback whales, hippos, sharks and other animals in danger, at 8:00.

Airs: August 04 at 8:00 PT/8:00 ET
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DiscoveryDiscovery’s 26th annual Shark Week starts tonight at 8:00 with Air Jaws: Countdown to Shark Week 2013.  Tune in for some amazing footage of great white sharks leaping out of the water in pursuit of prey.  Bet you didn’t know that sharks could fly.

Air Jaws: Fin of Fury
Airs: August 10 at 8:00 PT/8:00 ET
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DiscoveryDiscovery’s annual Shark Week kicks off tonight at 8:00 with Air Jaws: Fin of Fury, in which documentary filmmakers go looking for a giant shark.

Airs: August 18 at 10:00 PT/10:00 ET
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National GeographicNational Geographic Wild has the second season premiere of America the Wild, the show in which naturalist Casey Anderson tracks and studies elusive and endangered species across North America, at 10:00.

Airs: September 22 at 10:00 PT/10:00 ET
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National GeographicThe second season finale of the show that follows endangered species, America the Wild, is on National Geographic Wild at 10:00.