Martin Dohrn / Herd of giraffes (Giraffa camelopardalis) resting at night, Masai Mara, Kenya. Image taken at night using thermal camera technology, with no artificial light.

Chase Dekker / Humpback Whale (Megaptera novaeangliae) pod gulp feeding on Northern Anchovy (Engraulis mordax), Monterey Bay, California

Martin Willis / Spinifex Grass (Spinifex sp) in desert, Kata Tjuta, Australia

Jeff Foott / California Poppy (Eschscholzia californica) and Goldfield (Lasthenia californica) flowers,superbloom, Antelope Valley, California

Jeff Foott / Full moon over Balanced Rock formation, Arches National Park, Utah

Colin Monteath/ Hedgehog House / Icebergs in winter in lake, Hooker Glacier, Mount Cook, Mount Cook National Park, New Zealand

Shane P. White / Tephra during volcanic eruption, Mount Yasur, Tanna Island, Vanuatu

Flip Nicklin / Humpback Whale (Megaptera novaeangliae) calf, Maui, Hawaii

Flip Nicklin / Humpback Whale (Megaptera novaeangliae) breaching, Maui, Hawaii

Flip Nicklin / Humpback Whale (Megaptera novaeangliae) tail slapping at sunrise, Lahaina, Maui, Hawaii

SCOTLAND: The Big Picture / Mountains of Assynt and Loch Sionasgaig in the rain, Sutherland, Scotland, UK. November.

Jack Dykinga / Birdcage evening primrose (Oenothera deltoides) and desert golds (Geraea canescens) carpet the sandy washes beneath the Calumet Mountains, under the Milky Way. Mojave Trail National Monument, Mojave D...