Public Broadcasting Service (U.S.).

Relive Orson Welles' infamous radio dramatization 75 years after the mass hysteria event it spawned. The film examines the elements that made America ripe for the hoax: America's longtime fascination with life on Mars; the emergence of radio as a powerful new medium; the shocking Hindenburg explosion of 1937; and Welles himself, the 23-year-old wunderkind director of the drama and mischief-maker supreme.

As early humans spread out across the world, their toughest challenge was colonizing the Americas - because a huge ice sheet blocked the route. It has long been thought that the pioneers, known as Clovis people, arrived about 13,000 years ago, but an underwater discovery in Mexico suggests people arrived earlier than previously thought - and by boat, not on foot. How closely related were these First Americans to today's Native Americans? It's a controversial...

NOVA and National Geographic present exclusive access to an astounding discovery of ancient fossil human ancestors. Deep in a South African cave, a special team of experts has brought to light an unprecedented wealth of fossils belonging to a crucial gap in the record of our origins that spans the transition between the ape-like australopithecines (such as the famous Lucy) and the earliest members of the human family.

Fifty years ago, film crews for the Allied Expeditionary Force entered Nazi concentration camps to find atrocities beyond their imagination. Kept in a vault at London's Imperial War Museum since 1945, the film shows tragic images of the genocide including scenes of gas chambers, experimentation labs and the haunted, starving survivors. Some footage was filmed moments before the camps where liberated, as Nazi soldiers hurried to cover evidence.

World-famous scientist Stephen Hawking sets three ordinary people a series of fun challenges to show them how to think like a genius. Can they work out why they exist at all? Is it destiny or pure chance?

In 1931, two white women stepped from a box car in Paint Rock, Alabama to make a shocking accusation: they had been raped by nine black teenagers on the train. So began one of the most significant legal fights of the twentieth century. The trial of the nine falsely accused teens would draw North and South into their sharpest conflict since the Civil War, yield two momentous Supreme Court decisions and give birth to the Civil Rights Movement. In addition...

Diseases that were largely eradicated in the United States a generation ago-including whooping cough, measles, mumps-are returning, in part because nervous parents are skipping their children's shots. This NOVA special takes viewers around the world to track epidemics, explore the science behind vaccinations, and shed light on the risks of opting out. Highlighting real cases and placing them in historical context, the program traces outbreaks of communicable...

How do you get a genius brain? Is it all in your genes? Or is it hard work? Is it possible that everyone's brain has untapped genius-just waiting for the right circumstances so it can be unleashed? From a man who can immediately name the day of the week of any date in history to a "memory athlete" who can remember strings of hundreds of random numbers, David Pogue meets people stretching the boundaries of what the human mind can do. Then, Pogue puts...

Frail and failing but determined to see the war through to victory, FDR wins re-election and begins planning for a peaceful postwar world, but a cerebral hemorrhage kills him at 63. After her husband's death, Eleanor Roosevelt proves herself a shrewd politician and a skilled negotiator in her own right, as well as a champion of civil rights, civil liberties and the United Nations. When she dies in 1962, she is mourned everywhere as the First Lady...

World-famous scientist Stephen Hawking sets three ordinary people a series of mind-blowing challenges. Can they think like a genius? Can they work out where the universe came from?