Brian Armstrong

Big-cat expert Boone Smith tracks pumas in Patagonia, but the tables are turned when a big cat starts to stalk him.

Fathom Events and Discovery Channel are partnering to bring a premiere event, Discovery's Shark Week at the Movies, to select movie theatres for a one-night event on July 18. America's favorite week of television, "Shark Week," makes waves in movie theaters nationwide for a one-night event this summer. The exclusive event features an episode from 2016, "Return of the Monster Mako" and a special episode from 2017, "Return to Isle of Jaws" ahead of its television debut on Discovery Channel.

A documentary about the development and spread of the virtual currency called Bitcoin.

The rugged coast of our biggest state harbors the most incredible wildlife in America. When winter breaks, animals make the most of the endless sunshine before this world closes again in darkness. This is the story of the creatures that endure this harsh reality along the shoreline—Alaska's life on the edge.

In Louisiana, the so-called bayous form a network of navigable water arms with marshy banks that stretches for thousands of kilometers . The waters flow very slowly, with a barely noticeable current towards the sea at low tide and upstream at high tide. This complex ecosystem is home to a great diversity of animal and plant species. Shot in the border region between the states of Texas and Louisiana, the film follows the course of the approximately 900-kilometre-long Sabine River. It documents the sometimes surprising behavior of numerous animals that live there, such as ants, raccoons, crayfish, water turtles, egrets, pelicans, fish and jellyfish. The Mississippi alligator also lives here, growing up to two and a half meters long and weighing in at 90 kilograms. It is at the top of the food chain - and when it shows its 90 razor-sharp teeth with a beaming “smile”, you understand why.

Discover spectacular backcountry wonders unseen by tourists as you venture off the beaten track to experience the extraordinary hidden wilderness of Yellowstone National Park. Witness towering, newly mapped waterfalls; rarely seen predator behavior by wolves and grizzly bears; and ecological mysteries found only in this uniquely challenging environment.

Glacier National Park is undergoing dramatic changes. As the glaciers that give this wilderness its name rapidly melt away, it is clear the park will never be the same. Explore the backcountry of this scenic region s pristine forests, alpine meadows, rugged mountains, and spectacular lakes to discover a dramatic transformation and witness a defiant new environment as it emerges.

The tiny, subterranean shrew uses echolocation like a bat, venom like a snake, and must eat every two hours to survive.