Dylan Dreyer explores the oceans' most fascinating coral reefs all around the world, diving into reefs with amazing biodiversity, discovering that many active reefs aren't in warm waters and getting an up close and personal look at these ecosystems.

Dylan Dreyer travels to the coldest parts of Russia, home to some of the planet's largest animals; from polar bears to grey owls, the predators roaming this unbelievable landscape are some of the most dangerous and fascinating wildlife on Earth.