A bald eagle perched on a moss-covered branch. Adelie penguins against a blue-white ice floe in Antarctica. And the intense gaze of a timber wolf. Greenpeace is the calendar with a conscience, bringing the remote, unspoiled wilderness up close through portraits by Art Wolfe, Brandon Cole, Cyril Ruoso, and more of the world’s top nature photographers. Each image highlights what is at stake in the fight to preserve planet Earth and its natural treasures.