National Geographic has done a yeoman job of explaining the "cat and mouse" nature of the conflict between Green Berets at Fire Base Cobra and Taliban insurgents hiding in the mountains.

What turns you on? The mating ritual is as old as humankind itself, and scientists are putting the chemistry of love and lust under the microscope.

Mentoring and camaraderie hit a low point as friction grows between enlisted personnel and their superiors. Can a port call relieve the tension?

The Yangtze basin is home to 400 million people, making it one of the most densely populated river basins on earth. All those people have learned to live over generations with floods and disasters but thats about to change.

Series following the crew of the USS Nimitz. The Navy counsels sailors on how to get used to life back on land before the ship arrives home.

The center of the world famous Rio Carnaval is the Samba Parade - a fierce competition of vast scale among 13 neighborhood samba schools. Watching them are a panel of expert judges, more than 60,000 spectators and a TV audience of nearly half a billion. The unexpected is always expected during one of the largest parties on earth, and INSIDE is right there to find out how Rio survives and Carnaval continues to thrive.

Two crew members become embroiled in a scandal during the Nimitzs four-day port call in Hong Kong, and the captain announces a change of course.

The ancient city of Teotihuacan, Mexico was home to one of the most powerful and least understood civilizations. The civilization appeared out of nowhere to build some of the largest pyramids in the world, only to mysteriously vanish almost one thousand years later. National Geographic follows the ground-breaking excavations that have completely changed what was previously known or thought about the civilization of Teotihuacan.

The ancient city of Teotihuacan, Mexico was home to one of the most powerful and least understood civilizations. The civilization appeared out of nowhere to build some of the largest pyramids in the world, only to mysteriously vanish almost one thousand years later. National Geographic follows the ground-breaking excavations that have completely changed what was previously known or thought about the civilization of Teotihuacan.