Aerial view of Goma, Democratic Republic of Congo, Africa

Grise Fjord, most northern community in America, Nunavut, Canadian Arctic, Canada, North America

Tiny melons, Tibesti Mountains, Chad

Toubou houses in Tigui, Tibesti Mountains, Chad

The remains of the camp where Fridtjof Nansen over-wintered with Hjalmar Johansen in 1895-96, Franz Josef Land, Russia, Arctic Ocean, Eurasia

The Global Seed Vault just outside the town of Longyearbyen on the island of Spitsbergen in Svalbard, Norway, Arctic, Europe

Red mangrove plants (Rhizophora mangle), at low tide near the Volivoli Resort grounds on Viti Levu, Fiji, South Pacific, Pacific

Closeup of Caribu shoes, Grise Fjord, most northern community in America, Nunavut, Canadian Arctic, Canada, North America

Algae on an ice block, Baffin island, Nunavut, Canadian Arctic, Canada, North America

Boswellia sacra (frankincense) (olibanum) tree, Sultanate of Oman, Arabian Peninsula

Tamarix aphylla wood at the edge of the palm grove of Zagora, Draa River valley, Province of Zagora, Region Draa-Tafilalet, Morocco

The Global Seed Vault just outside the town of Longyearbyen on the island of Spitsbergen in Svalbard, Norway, Arctic, Europe

The Global Seed Vault just outside the town of Longyearbyen on the island of Spitsbergen in Svalbard, Norway, Arctic, Europe

Adelie penguins (Pygoscelis adeliae) in snowstorm at Brown Bluff on the Antarctic Peninsula in the Weddell Sea, Antarctica, Polar Regions

Isolated tree among sandstone rock formation in the desert canyons of the Ashar Valley, Medina Province, Saudi Arabia

Isolated tree among sandstone rock formation in the desert canyons of the Ashar Valley, Medina Province, Saudi Arabia

Adult male polar bear (Ursus maritimus), on multi-year ice floes off the eastern coast of Spitsbergen in the Svalbard, Norway

Mother polar bear (Ursus maritimus), with cub of the year in Holmabukta in the Svalbard Archipelago, Norway

Adelie penguins (Pygoscelis adeliae) in snowstorm at Brown Bluff on the Antarctic Peninsula in the Weddell Sea, Antarctica, Polar Regions