Excerpts from 30 years of National Geographic specials. See the first Americans climb Everest, Cousteau's undersea adventures, Leakey's fossil discoveries and more.

Every year, a million visitors are drawn to the Salisbury Plain in southern England, to gaze upon a mysterious circle of stones. Stonehenge may be the best-known and most mysterious relic of prehistory. Now investigations inside and around Stonehenge have kicked off a dramatic new era of discovery and debate. Who built Stonehenge? What was its purpose? How did prehistoric people quarry, transport, sculpt, and erect the giant stones? A new generation...

From vaccines to antibiotics, clean water to nutrition, bio-terror threats to the HIV/AIDS pandemic, the six-part series Rx for Survival: A Global Health Challenge tells the compelling stories of global health challenges and successes. Employing both historical dramatic sequences and poignant current documentary stories, the series showcases key milestones in public health history, such as the eradication of smallpox, alongside modern and future...

Cold is the new hot in this brave new world. For centuries we've fought it, shunned it, and huddled against it. Cold has always been the enemy of life, but now it may hold the key to a new generation of science and technology that will improve our lives. In Making Stuff Colder, David Pogue explores the frontiers of cold science from saving the lives of severe trauma patients to ultracold physics, where bizarre new properties of matter are the norm...

The world has always been a dangerous place, so how do we increase our odds of survival? In Making Stuff Safer, David Pogue explores the cutting-edge research of scientists and engineers who want to keep us out of harm’s way. Some are countering the threat of natural disasters with new firefighting materials and safer buildings. Others are at work on technologies to thwart terrorist attacks. A next-generation vaccine will save millions from deadly...