Mark Emery

The murky waters of the Yellowstone serve as the backdrop for the adventurous survival of the brown trout, Oncorhynchus clarki. Every year, these trout swim upstream to spawn, but their journey is hindered by a thousand dangers. Attacked from the air, on land, and in the water, these defenseless prey seek to return to their birthplace.

For humans, change, mutation, is part of the very process of life, from birth to death. But for some living beings, change is far more radical. Tadpoles transform into frogs, caterpillars into butterflies, and these aren't even among the most radical changes possible in nature. The ability to transform, to change, is often crucial for survival. Only by adapting to their surrounding environment, through extraordinary transformations, can these animals continue to live on our planet.

From the moment they emerge, in the rivers of Alaska, salmon begin a lifelong journey. Their instincts lead them to follow the rivers, to the sea, and back to the waters where they were born to lay new eggs and die within about five years. A long, arduous journey, fraught with dangers, obstacles, and enemies to face. National Geographic guides us on this little odyssey.

Florida is home to beaches, coral reefs, pine forests and the famous Everglades wetland, but a growing human population and abandoned exotic pets like pythons are threatening this wild paradise. Can Florida’s ecosystems continue to weather the storm?

Consistently stunning documentaries transport viewers to far-flung locations ranging from the torrid African plains to the chilly splendours of icy Antarctica. The show's primary focus is on animals and ecosystems around the world. A comic book based on the show, meant to be used an as educational tool for kids, was briefly distributed to museums and schools at no cost in the mid-2000s.