From both ends of the Arctic, Nikita in Siberia and Martha in Alaska send a distress signal as the ground sinks beneath their feet and fossil fuel companies greedily expand into the far north.

Billions of years ago, Venus may have harbored life-giving habitats similar to those on the early Earth. Today, Earth's twin is a planet knocked upside down and turned inside out. Its burned-out surface is a global fossil of volcanic destruction, shrouded in a dense, toxic atmosphere. Scientists are now unveiling daring new strategies to search for clues from a time when the planet was alive.

Wildlife photographer Steve Winter and cameraman Bertie Gregory capture the lives of jaguars in the Pantanal of Brazil; a mother jaguar teaches her cub how to survive, while a male jaguar dives headfirst into a river to tackle a six-foot-long caiman.

As wild bears adapt to suburban life, they show us we're not so different. Co-thriving begins with us.

"Don't go in the Water."  This line bred fear in millions of people around the world.  In 1975, Jaws showcased the greatest eating machine, the great white shark, on the big scren and changed the swimming habits of movie-goers everywhere.  By far the most feared creature in the sea, this species is responsible for more attacks on human beings that all other sharks combined.  Step outside the Hollywood hype and travel to South Australia with an expedition as they attempt to increase understanding and reduce human/shark confrontations.  Observe the behavior and lifestyle of the great white shark, and see these miracles of evolution up close in this unforgettable exploration under sea.

Imagine a beautiful day at sea, the magnificent waters allowing you to feel weightless and serene.  And then you see it - the infamous single fin moving slowly in your direction.  You panic...why?  Man has always lived in fear of the shark because these predators represent for most, the epitome of evil and voraciousness.  Ease your fears and join John Stoneman as he sets out to dispel many of the myths that surround the shark.  But, don't get to comfortable.  As John Stoneman will point out, there are certain species that must be feared.

Filmmaker Roman Polanski and photographer Ryszard Horowitz meet in Kraków, Poland, where, strolling the streets, they share memories of their childhood and youth, the hardest days of their lives, when, during World War II, they met in the ghetto established by the Nazi occupiers.