NOVA joins scientists in Argentina as they help locate kidnapped children and identify thousands of dead in the aftermath of a military reign of terror.

The adventures of the Voyager 2 spacecraft continue as it passes the rings of Uranus. Scientists suspect that unhappy events in the early history of the planet may have shaped Uranus and its strange collection of moons.

Scientific breakthroughs now make it possible to reproduce ourselves in ways never before imagined. NOVA looks at the medical, legal and moral questions raised by this brave new technology.

What are the prospects for halting or curing the deadliest epidemic ever to challenge modern medicine? NOVA finds cause for both hope and alarm in the battle against AIDS.

Could there be life beyond Earth? Only recently has it become possible to scan the skies in a systematic attempt to find out. NOVA joins the search with guest host Lily Tomlin.

Birds do it; bees do it, butterflies, bats and eels do it - all leave one habitat to migrate to another, often thousands of miles away. NOVA penetrates the mystery of where animals migrate, why and how they get there.

NOVA dips into the sad plight of our coastal waters, where toxic chemicals, raw sewage and disease-carrying microbes are routinely dumped.

Yankee ingenuity has designs on the America's Cup. NOVA goes behind-the-scenes to look at the engineering effort to design a technically advanced sailboat.

Leprosy, a misunderstood disease that has been curable for 40 years, still afflicts some 12 million people. NOVA looks at the tragedy of the disease that need not be.

NOVA explores the ground-breaking experiments that led to the discovery of a tiny sequence of molecules - and more clues to the mystery of how a complete baby develops from a single cell.

NOVA scans the universe with the infrared eye of IRAS - the Infrared Astronomical Satellite - and discovers never-before-seen comets, stars, galaxies and other celestial wonders and enigmas.

NOVA examines a controversial theory that traces our ancestry to a small group of women living in Africa 300,000 years ago.

Between 60 and 80 percent of all commercial airplane accidents are attributable to pilot error. NOVA looks at some shocking instances of pilot negligence and what airlines are doing to solve the problem.

NOVA cameras travel to Borneo, one of the last habitats of the wild orangutans, where scientists study the endangered ape. Who is observing whom? It is not always clear.

Fifty years after his passing, the creator of psychoanalysis is still the subject of intense debate. Was Freud right or wrong? NOVA profiles the enigmatic man and his controversial legacy.

NOVA travels to Antarctica with an emergency scientific expedition to study a baffling "hole" in the Earth's protective ozone layer.

Harvard chemist George Kistiakowsky was an anti-Bolshevik soldier in 1919 Russia, an atomic bomb scientist at Los Alamos, a presidential adviser in the Eisenhower White House and an arms control activist. Shortly before Kistiakowsky passing, he recounts his eventful career to interviewer Carl Sagan.

NOVA presents two hours of the best from its 14 seasons of exciting science coverage. A "talking" chimp, an exploding volcano and a sight-and-sound space video are but a few of the memorable segments. Richard Kiley hosts.

All over the world, farmers are taking more from the soil than they return. NOVA reports on the soil crisis in world agriculture - a plight that has already resulted in massive starvation.

In rich and poor countries alike, once-productive farms are turning to desert because of mismanagement of water resources. NOVA examines the causes and cures of desertification..

In a case study of the strengths and weaknesses of the United States space program, NOVA chronicles the ambitious and long-delayed Galileo mission to Jupiter - still on the ground long after its planned May 1986 launch.