NOVA's expert team looks for the signature of a volcanic eruption big enough to have blasted a huge cloud of ash and sulfuric acid into the atmosphere. Killer Volcanoes spotlights the search for the mystery volcano that plunged the globe into a deep freeze and inflicted famine on medieval Europe.

Great things come in small packages. This film tells the epic survival stories of the world’s tiniest animals, from a mini sengi, the “cheetah” of the shrew world, to a small shark that walks on land. For these animals, size doesn’t matter.

In The Wonders of America's State Parks, join best-selling travel writer Joe Yogerst for a virtual tour of over 100 state wilderness areas stretching from New England to the Hawaiian Islands. You'll learn how these parks came into existence, what makes them a special part of America's story, and how to get the most out of a visit - whether you want historical insights or panoramic views.

Deep inside a pristine forest, we hear the sudden sound of a chainsaw felling a fir tree. So begins this breathtakingly photographed, puzzle-like documentary which follows the mysterious journey of the tree’s lumber entirely through thirteen 360° panning shots; a wide-angle picture of the role nature plays in a world defined by globalization. Official Selection at the **Sundance Film Festival**.

Scientists journey to Kīlauea volcano to investigate the eruptions that shook Hawaiʻi in 2018

Join NOVA to witness the brainpower of birds. Long mocked as empty-headed, our feathered friends hide surprisingly acute intelligence. But how smart are they? Watch as scientists test avian aptitude and challenge our basic notions of intelligence.

PRIMATE presents the daily activities of Yerkes Primate Research Center. Scientists in the film are concerned with studying the physical and mental development of primates. Some of the experimental work shown in the film deals with the capacity to learn, remember, and apply language and manual skills; the effect of alcohol and drugs on behavior; the control of aggressive and sexual behavior; and other neural and physiological determinants of behavior.....

Follow the unforgettable journey of a family of wild dogs in Zimbabwe and witness rarely seen behavior, from tender moments with newborn pups, to the thrills of hunting wildebeest, to close encounters with their greatest enemy - the lion.

Otters are playful, adaptable and champion swimmers - they have captivated cameraman Charlie Hamilton James for the last 25 years. He has filmed them more than anyone else. Now, through the eyes of three orphaned river otters, a set of groundbreaking experiments and some incredible wild encounters, Charlie wants to reveal their survival secrets and exactly why he believes they are so special.

During his four-decade career as a photographer and explorer, James Balog has focused his lens on the complex relationship between humans and nature. Human activity has now surpassed all other forces shaping our world. Balog’s work has challenged us to contemplate our place in, and responsibility to, the natural world. Balog investigates how altering the elements is in turn affecting everyday Americans right now. THE HUMAN ELEMENT features subjects...