PBS Nature schedule

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Animal behaviorists, psychologists, trainers and pet owners offer thoughts on what draws humans to dogs and cats.

The history of the cow and why it is the most influential domestic animal in the world.

Prosthetics help disabled animals survive.

Scientists and law enforcement agents enlist the help of plants and animals in solving crimes.

Martin Nicholas searches for exotic spiders such as the goliath birdeater of Venezuela and a small South American spider that creates a web up to 30 feet long.

The behavior of female animals.

Male animals will stop at nothing for the right to mate with a female.

Scientists use poisons from animals to create lifesaving drugs.

The world of lizards and their bags of tricks.

Culturally, the snake is either vilified or revered.

The diversity and abilities of turtles.

The world of lizards and their bags of tricks.

Some croc species have exceeded 20 feet -- Nile crocs, American crocs and the Asian-Pacific saltwater croc; hosted by Romulus Whitaker.

Florida's Everglades National Park is a protected wilderness where predatory pythons thrive.

Scientists try to save populations of frogs, as large-scale die-offs of the amphibian continue around the world.

Sharks, rays, squids and blue whales live in Pacific waters off the California coast.

Underwater filmmakers Howard and Michele Hall go diving 300 miles off the coast of Central America.

Marlin, sailfish, spearfish and swordfish are the largest and most highly prized of all game fish.

The relationship between humans and dolphins is examined, including efforts to communicate and the effect of captivity.

Some 30,000 animals and plants live in replicated ocean environments at Monterey Bay Aquarium.

Horseshoe crab numbers drop as their use as bait by the fishing industry increases.

The fur trade continues to threaten the South American otter, despite its status as an endangered species.

Ranchers and scientists practice conservation in Venezuelan and Colombian grasslands to protect native animals.

The story of a young journalist and an orphaned sloth that she fostered for two years before sending it back to the wild.

Examples of how the rain forest acts as an engine of evolution.

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