Dive into the long year of the Alaskan brown bear through the Earth's seasonal cycle amid the frigid winter months and into the warmth of summer.

The elements that constitute every living being were formed within the very first stars. Today, a green sea turtle searches the ocean for them.

The story of water's miraculous arrival onto our planet and its pivotal role in the survival — and amusement — of a herd of elephants.

Shaping our entire universe, gravity has set the stage for life. For two king penguins, it steered them toward their soulmates.