Explores how animals have evolved over time, and analyses their evolution to learn and benefit from nature's engineering.

The alligator snapping turtle wields a gruesome bite, the cassowary is the world..

Nature's survivors thrive against the odds. Polar bears eke out an existence on the ice; in the Himalayas, yaks combat dizzying altitudes with incredible design; in the deserts, jerboas battle the extreme heat; as the temperature drops, wood frogs employ extreme measures and the Japanese macaque switches into winter mode.

In the evolutionary arms race, stealth separates predator from prey. Chameleons vanish amongst the leaves, while stick insects blend into the flora; Arctic foxes disappear into the snowy expanse, while Long-eared owls have mastered silent flight. The Leafy sea dragon morphs to escape detection.

Emperor penguins use their physical makeup to perform daring deep dives, while the Monarch butterfly migrates thousands of miles.