NOVA - Season 43 Episode 19 Can Alzheimer's Be Stopped?

A fascinating and colorful look at the ways more than 500 million people adjust to life in the shadow of essential, yet potentially deadly, volcanoes.

Illuminating look into strictly adult occupations.

Earth is a collection of worlds within worlds, each one a self-contained ecosystem bursting with life. These microworlds depend on an intricate web of relationships and natural forces that make each one unique. This stunning series delves deep into the heart of these habitats, breaking down each intricate ecosystem into all of its component parts, introducing the animals that live there, and revealing the fine balances of its existence.

Take a gentle walk as familiar faces explore landscapes in Yorkshire and Cumbria in this series of immersive and intimate documentaries.

Backcountry guide and explorer Greg Aiello brings attention and analysis to viral videos documenting some of mother nature's unbelievable occurrences, from natural disasters to animal attacks.

The comedian explores the British isles in her vintage camper van, Helen, taking in some dramatic scenery, unspoilt countryside and incredible historic sights along the way.

Nature is given a voice to raise awareness that people need nature in order to survive.

The tropical islands that lie between Asia and Australia are among the biologically richest on earth, and home to a vast number of plants and animals. From tree kangaroos to tarsiers, manta rays to mudskippers, the region abounds with life. But why? The answer lies deep in time, due to the many millions of years these islands have existed - and the power of the earth, the sun and the moon.

60 Minutes, an Australian version of the U.S. television newsmagazine 60 Minutes, airs on Sunday nights on the Nine Network and is presented in much the same way as the American program on which it is based. The New Zealand version of the show has also featured segments of the Australian version. Gerald Stone, the founding executive producer, was given the job by Kerry Packer and was told: "I don't give a f... what it takes. Just do it and get it right." After the first episode was broadcast on 11 February 1979, Packer was less than impressed, telling Stone: "You've blown it, son. You better fix it fast." Over the years, Stone's award winning 60 Minutes revolutionised Australian current affairs reporting and enhanced the careers of Ray Martin, Ian Leslie, George Negus, and later Jana Wendt. Since it was first broadcast, 60 Minutes has won five Silver Logies, one Special Achievement Logie, and received nominations for a further six Logie awards.

Journalists participate in a round-table discussion of news events in this award-winning public affairs series. It first aired in 1967, making it the longest-running prime-time news and public affairs program on television.

The Fraggles might be apart in separate caves, but they can still find ways to have fun together! Join Gobo, Red, Boober, Mokey, Wembley, and Uncle Travelling Matt for stories and songs that show everyone how we're all connected.

A live-action children's television anthology series retelling popular fairy tales.

TV's most-watched history series brings to life the compelling stories from our past that inform our understanding of the world today.

Destination Truth is a weekly American paranormal reality television series that premiered on June 6, 2007, on Syfy. Produced by Mandt Bros. Productions and Ping Pong Productions, the program follows paranormal researcher Josh Gates around the world to investigate claims of the supernatural, mainly in the field of cryptozoology.

America's popular television News magazine in which an ever changing team of CBS News correspondents contribute segments ranging from hard news coverage to politics to lifestyle and pop culture.

The famed survivalist takes A-list celebrities on journeys into the wildest locations around the world, forcing the stars to push their bodies and minds to the limit to successfully complete the adventure of a lifetime.

Kat is a woman who struggles every day against society and her mother to prove that she can still live a happy and fulfilling life despite still being single at 39. Which is why she recently spent her entire savings to open a cat café in Louisville, Kentucky.

Richie Richard (socially awkward, sexually inexperienced) and Eddie Hitler (carefree alcoholic ) are two social outcasts living on the dole. Trapped together in a squalid flat in Hammersmith, London they are perpetually skint, bored and sexually frustrated. They spend their days scheming, bickering, and being nasty and sadistic to each other.