Nature
Dog trainers adopt unwanted dogs from shelters and train them to herd sheep and sniff bombs.
Dog trainers adopt unwanted dogs from shelters and train them to herd sheep and sniff bombs.
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Icebergs
Powerful winds affect Antarctica's climate and topography.
Penguins, seals, soft corals, sponges, tubeworms, anemones and giant cod adapt to life in Antarctica's subzero waters.
Wildlife filmmaker Hugo van Lawick explores relationships within a wild-dog pack on Africa's Serengeti plain.
The relationship and interdependence between man and dog that develop during the 1,200-mile Iditarod dog-sled race.
Dog trainers adopt unwanted dogs from shelters and train them to herd sheep and sniff bombs.
Wildlife filmmaker Hugo van Lawick explores relationships within a wild-dog pack on Africa's Serengeti plain.
In Yellowstone, size and power square off against speed and teamwork: grizzly vs. wolf.
Ecologist Chris Morgan travels to northern Alaska in late fall to see polar bears.
Ecologist Chris Morgan explores the world of black bears.
Ecologist Chris Morgan camps among the largest concentration of grizzles in the world.
The rescue of the grizzly population of Yellowstone and ensuing social problems.
Rangers at Denali National Park in Alaska train hikers for planned encounters with grizzlies bears fish for salmon.
From dust storms in Australia to ice storms in Canada: How temperature drives weather.
Without water, there would be almost no weather: Richard explores water's crucial role.
Man-made tornadoes and whirlwinds made of fire: Richard visits one of the windiest places.
Explore how primates adapt to extreme environments and changing conditions worldwide.
Eider ducks, albatrosses, magpies and cockatoos - join us on a journey to meet the birds.
Big cats impress with elegance and strength – from tigers to elusive snow leopards.
The restoration of forest land in the British Isles helps revive the goshawk.
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