Embark on an astounding journey across 100,000 light-years to witness key moments in the history of the Milky Way. Using cutting-edge science, National Geographic constructs a 3-D state-of-the-art CGI model of the galaxy. Peer into the heart of the Milky Way on the hunt for super-massive black holes, watch how stars are born and die, fly out and above the plane of the galaxy to understand its true shape, and scour its dusty spiral arms for the possibility...

The eruption of Iceland's Eyjafjallajökull volcano in 2010 turned much of the northern hemisphere into an ash-strewn no-fly zone. Katla, an Icelandic volcano 10 times bigger, has begun to swell and grumble, and Hekla and Laki, could erupt without warning. Iceland is a ticking time bomb: When it blows, the consequences will be global. What can we do to prepare for the coming disaster?

While global warming has been heating up the world, recently scientists were stunned to discover that the sun has actually been growing dimmer, with less and less sunlight reaching earth's surface. Nova unravels this baffling climate detective story.

Presents the story of NASA's Apollo program and the lunar landings by American astronauts made between 1968 and 1972. Features rare archival footage and interviews with surviving astronauts.