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Animal communication.

Do you believe in ghosts? To those who claim to have seen them, there's no question ghosts are alive and active in our everyday lives. Others flat out deny their very existence. Now scientists say there may be an alternative explanation.

Animals living outside their habitat.

The war against infectious diseases.

We are not alone. Even in our most lonesome hour, tiny eyes are watching us. Creatures of the microworld can be found in the air we breathe, the food we eat and even inside our bodies.

People are always complaining about the weather; seems like it's always too hot or too cold. Find out what would happen if Earth's temperature really took a dramatic turn. The slightest change could transform the entire planet.

Deadly volcanoes.

The adaptability of the human species.

History shows that humans have been seeking the elusive Fountain of Youth for thousands of years. With medical and technological advances, humans are closer than ever to looking younger, but much is yet to be discovered about why people age.

The power of explosives.

To most people, evil acts are brutal, cold-blooded and mind baffling. Find out what drives human beings to commit heinous crimes like rape and murder. Are they products of their environment, or are select individuals simply born to be bad?

The people who build thrill rides and their cutting-edge designs.

Research and discovery at the depths of the Mariana Trench.

Scientists hope to turn deadly mosquitos into flying vaccinators.

Firefighters escape not only the mighty flame, but also scorching third degree burns while saving millions of lives. Scrutinize fire's violent moods and its sheer power. Journey to find this new insight in the lab, in the field, and in virtual reality.

A new generations of spy planes.

People lose their lives in severe weather events.

In a few years of bewildering aeronautical innovation, we have gone from flimsy flying machines to the awesome speed and power of the SR-71 Blackbird. Explore black aircrafts and the hidden secret of the mysterious U.S. spy plane.

Technological tools, including plasma rockets and space elevators, allow travel to Mars.

Searching for the secrets of sex appeal.

A storm is coming causing wild fluctuations in the earth's magnetic field. The cataclysm mangles radio and television signals and kills all phone and power lines plunging millions into blackouts.

Possible weapons of the 21st century.

Planet Earth lies in the center of a cosmic storm. Cataclysmic events on one intergalactic neighbor offers a sobering reminder of what could be next for Mother Earth.