1 Mountains 2019-04-01
Only the toughest animal species can endure the extreme weather, scarce food and limited oxygen available on the Earth’s highest mountains.
2 Oceans 2019-04-08
Dive beneath the surface of Earth’s dynamic oceans to uncover the extreme conditions to which animals must constantly adapt.
3 Grasslands 2019-04-15
In the grasslands, animals endure freezes, fires, floods, and droughts. Bull elephants clash in mating battles. Cheetahs and gazelles engage in a predator-and-prey dance in the Kenyan savanna. Bison battle a blizzard while being pursued by wolves.
4 Jungles 2019-04-22
Jungles comprise the most diverse habitats on Earth in which only the most resilient species triumph. The fiercest jungle species include jaguars, caimans, gibbons, orangutans, spectral tarsiers, hummingbirds, and parasites.
5 Deserts 2019-04-29
Deserts are getting even hotter, drier and bigger, yet a host of remarkable animals still survive in the harshest of conditions, including cunning hyenas, pint-sized meerkats and sand-dwelling spiders.
6 Polar 2019-05-06
The frozen poles are home to the planet's ultimate survivalists, including polar bears, penguins and Arctic wolves. Their world is changing fast -- breaking apart under their feet -- and their resilience will be tested beyond the extreme.
