A documentary on Al Gore's campaign to make the issue of global warming a recognized problem worldwide.

Sniper: Bulletproof deconstructs and analyzes the little-known sniper events that have occurred when no other course of action was possible. The people who planned the takedowns, or pulled the trigger, share their techniques and bring to light the many factors that had to be considered in each mission: terrain, wind speed, temperature, elevation changes... all are critical to taking out targets considered bulletproof. A sniper has one chance, one breath, to rise to the occasion and save the day... if they miss, there may never be another opportunity. As these never told before stories unfold, the viewer also learns about the high-tech gear each sniper carries on their classified missions.

Bejeweled Fishes captures the spectacular beauty of the myriad fishes inhabiting coral reefs of the Tropical and Eastern Pacific. This Wild Window was captured in the Maldives Islands, Fiji, the Philippines, Mexico, California, and Indonesia.

This film consists of three parts. The first dramatizes the life of the founder of Soviet astronautics, Konstantin Tsiolkovsky; the second describes the development of rocket technology; and the third visualizes the future with enactments of the first manned spaceflight, spacewalk, space station construction and humans on the moon.

Trees talk, know family ties and care for their young? Is this too fantastic to be true? German forester Peter Wohlleben and scientist Suzanne Simard have been observing and investigating the communication between trees over decades. And their findings are most astounding.

In a dark, ambiguous environment, minuscule particles drift slowly before the lens. The image focuses to reveal spruce trees and tall pines, while Innu voices tell us the story of this territory, this flooded forest. Muffled percussive sounds gradually become louder, suggesting the presence of a hydroelectric dam. The submerged trees gradually transform into firebrands as whispers bring back the stories of this forest.

Follow ocean legend Sylvia Earle, renowned underwater National Geographic photographer Brian Skerry, writer Max Kennedy and their crew of teenage aquanauts on a year-long quest to deploy science and photography to inspire President Obama to establish new Blue Parks to protect essential habitats across an unseen American Wilderness.

Riding Giants is story about big wave surfers who have become heroes and legends in their sport. Directed by the skateboard guru Stacy Peralta.

Of the Seven Wonders of the Ancient World, the Pyramid is the only one to survive. Many believe that even with our 21st-century technology, we could not build anything like it today. Based on the most up-to-date research and the latest archaeological discoveries, here is how the Pyramid came to be.

Many geneticists and archaeologists have long surmised that human life began in Africa. Dr. Spencer Wells, one of a group of scientists studying the origin of human life, offers evidence and theories to support such a thesis in this PBS special. He claims that Africa was populated by only a few thousand people that some deserted their homeland in a conquest that has resulted in global domination.

Described as being a film about determination, danger and the ocean’s greatest depths, James Cameron's "Deepsea Challenge 3D" tells the story of Cameron’s journey to fulfill his boyhood dream of becoming an explorer. The movie offers a unique insight into Cameron's world as he makes that dream reality – and makes history – by becoming the first person to travel solo to the deepest point on the planet.

Ocean Oasis is a fascinating journey into the bountiful seas and pristine deserts of two remarkably different, but inextricably linked worlds — Mexico's Sea of Cortés and the Baja California desert.

The Dream Is Alive takes you into space alongside the astronauts on the space shuttle. Share with them the delights of zero gravity while working, eating and sleeping in orbit around the Earth. Float as never before over the towering Andes, the boot of Italy, Egypt and the Nile. Witness firsthand a tension-filled satellite capture and repair and the historic first spacewalk by an American woman.

A 3-part documentary granting a unique and privileged access into the magical world of whales and dolphins, uncovering the secrets of their intimate lives as never before. Episode 1: Giant Lives / Episode 2: Deep Thinkers / Episode 3: Voices of the Sea

An award-winning feature-length creative documentary exploring the extraordinary world of the plasmodial slime mould through the eyes of the fringe scientists, mycologists and artists. In recent years this curious organism has become the focus of much research in such areas as biological-inspired design, emergence theory, unconventional computing and robot engineering.

Oceanographer Sylvia Earle and a cast of marine scientists tell the story of the incredible work being done to protect our oceans fragile ecosystem.

When the U.S. trade embargo left Cuba isolated from medical resources, Cuban scientists were forced to get creative. Now they've developed lung cancer vaccines that show so much promise, some Americans are defying the embargo and traveling to Cuba for treatment. In an unprecedented move, Cuban researchers are working with U.S. partners to make the medicines more widely available.

An African narrator tells the story of earth history, the birth of the universe and evolution of life. Beautiful imagery makes this movie documentary complete.

William Shatner sits down with scientists, innovators and celebrities to discuss how the optimism of 'Star Trek' influenced multiple generations.

THE GREAT AUSTRALIAN FLY looks at how a national nuisance has shaped Australia and its people, confounding our scientists, influencing our lifestyle and defining the way we speak. But is its value misunderstood? The one-hour documentary explores how this much-maligned spoiler of the Australian summer is in fact a crime solver, healer, pollinator and street sweeper. We'd miss them if they were gone, yet we put huge amounts of energy into wiping them out. Is it time to call a truce? Directed by Tosca Looby and produced by Sally Ingleton, the amusing and intriguing film pays homage to a much-maligned invertebrate and the influence it has had on our world.