WGBH Educational Foundation.

A million or more years ago, during the Ice Age, Australia was home to a wide range of extraordinary giant animals. None was quite as bizarre or fearsome as Thylacoleo, the meat-eating marsupial lion. Pound for pound, this creature had the most powerful bite of any mammal, living or extinct. Even though it was at the top of the ancient Australian predators, Thylacoleo was eventually toppled from its throne, dying out along with all the rest of the...

In the hot and deadly summer of 1964, the nation could not turn away from Mississippi. Over ten memorable weeks known as Freedom Summer, more than 700 student volunteers joined with organizers and local African Americans in a historic effort to shatter the foundations of white supremacy in one of the nation's most segregated states, even in the face of intimidation, physical violence, and death.

A compelling and complex story of one of the most convulsive and transformative eras in American history. In the closing decades of the nineteenth century, the U.S. population doubled in the span of a single generation, national wealth expanded, and two classes rose simultaneously, separated by a gulf of experience and circumstance that was unprecedented in American life.

For weeks, the world's eyes have been fixed on the tens of thousands of refugees fleeing war-torn Syria for Europe. But what is life like for those left behind?

Follow the adventures of a curious newborn chick, Peep, and his friends, Chirp the robin and Quack the duck. The three birds explore their world and learn about basic scientific principles.

It's pitch black, toxic gases bubble up from deep below, sulfuric acid drips from above, and carbon monoxide fills the air. It is the interior of a startlingly beautiful, and treacherous, cave. Scientists are penetrating the depths of incredible caverns like this one, discovering abundant life hidden in the dark, and shedding new light on how life may have begun on earth and may exist on Mars and other worlds. Explore Cueva de Villa Luz in Mexico,...

With Islamic extremists gaining ground in Iraq, and the Obama administration being pulled back into the conflict, This is a timely and late-breaking report on the crisis in Iraq.

The modern music scene was born at Woodstock in 1969, where half a million fans, dozens of artists, and the politics of the times came together in a big bang that would eventually generate billions of dollars. Over the last twenty years, however, MTV, compact discs, corporate consolidation, Internet piracy, and greed have contributed to a perfect storm for the recording industry. Frontline talks with musicians, record industry insiders, and journalists...

Join renowned gadget geek and host David Pogue as he sets out on a quest to discover how batteries work, and uncover what the future has in store for our gadgets, our lives, and even our planet.

A look at modern religion through the artifacts left behind, as well as an exploration into science and the scriptures.