Aggressive ocean predator, the bull shark, ventures up rivers to find prey. But lurking is a deadly killer - the Nile crocodile. Reports of clashes between the two are many but marine researchers are determined to find out the truth.
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People use an ecological design process to shift impact from destructive to regenerative.
Jean-Michel Cousteau documents encounters with a variety of the ocean's ultimate predator.
In the biodiverse marine region, there are extraordinary creatures beyond imagination.
ALERT seeks to return lions to the wild.
ALERT seeks to return lions to the wild.
A look at humanity's documenting of belief systems and illuminating observations.
A look at the brilliant geometric shapes and exceptional megalithic sites across the Earth.
A look at ancient architecture, which stands as a lasting testimony to human achievement.
How historical icons like Alexander the Great, Cleopatra and Vlad III died.
Dr. Keri's dog, Siri, brings home a wild baby fox, which starts her on a quest to learn more about caring for wildlife.
Dr. Keri looks after bulls who seem determined to hurt themselves.
Just when it seems this harsh winter will never end, Dr. Keri delivers the first calf of spring.
Dr. Keri demonstrates sheer prairie grit, crossing a dangerous ice road for winter preg checks.
Rising sea levels might mean hurricanes' storm surges could impact farther inland in the future.
The natural world has evolved through millions of years to deal with the strongest storms on earth.
Animals of Africa: zebras; giraffes; hyenas.
The strength of the leaf-cutter ant; how fast a pronghorn can run; how the desert camel can survive.
Sharks use electro-sensors to detect prey; skunks' stinky defense mechanism; zebras vs. horses.
Primates: chimpanzees; spider monkeys; howler monkeys.
Dogs: greyhounds' speed, bloodhounds' noses and border collies' brains.
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