Colin Monteath / Tourists viewing large tabular icebergs from the deck of a boat, Southern Ocean, Antarctica

Konrad Wothe / Common Sunflower (Helianthus annuus) with blue sky and clouds behind

Konrad Wothe / Common Sunflower (Helianthus annuus) with blue sky and clouds

Konrad Wothe / Champagne pool, Waiotapu Thermal Wonderland, North Island, New Zealand

Konrad Wothe / King Penguin (Aptenodytes patagonicus) colony along shoreline, South Georgia Island

Mark Moffett / Galapagos Giant Tortoise (Chelonoidis nigra) in wallow, herd of feral goats nearby, near Alcedo Volcano, Isabella Island, Galapagos Islands, Ecuador

Chris Newbert / Coral reef reflected in surface, showing coral reef as well as sky and clouds, Red Sea, Egypt

Tim Fitzharris / Western Gull (Larus occidentalis) flock flying, North America

Chris Newbert / Stony Corals, Red Sea, Egypt

Tui De Roy / Maori Onion (Bulbinella hookeri) cluster in full summer bloom, Cobb Valley, Kahurangi National Park, South Island, New Zealand

Flip Nicklin / Sperm Whale (Physeter macrocephalus) researcher photographing whale pod

Norbert Wu / Above and below water view of coral reef and tropical island, Solomon Islands

Norbert Wu / Disc Coral (Turbinaria reniformis) provides shelter for squirrelfish, Ulong Channel, Palau

Norbert Wu / Coral reefs and tropical island famous dive sites, Palau

Flip Nicklin / Orca (Orcinus orca) pair performing at Sea World, San Diego, California

Flip Nicklin / Orca (Orcinus orca) siblings from pod A-5 playing at rubbing beach, Johnstone Strait, British Columbia, Canada

Flip Nicklin / Atlantic Spotted Dolphin (Stenella frontalis) group swimming with divers, Bahamas

Flip Nicklin / Atlantic Spotted Dolphin (Stenella frontalis) group, Bahamas

Flip Nicklin / Atlantic Spotted Dolphin (Stenella frontalis) social group of well-spotted adults and lesser marked juveniles, Bahamas

Flip Nicklin / Dusky Dolphin (Lagenorhynchus obscurus) pod, near Kaikoura, New Zealand

Flip Nicklin / Atlantic Spotted Dolphin (Stenella frontalis) with diver, Bahamas

Flip Nicklin / Bottlenose Dolphin (Tursiops truncatus) underwater group, Hawaii

Tui De Roy / Volcanic tuff formations on high Andean plateau, Mismi Mountain, Colca Canyon, Peru

Tui De Roy / Deeper than the Grand Canyon, Colca Canyon in Peru drops 3,400 meters from mountain top to river

Flip Nicklin / Gray Whale (Eschrichtius robustus) bottom feeding, Vancouver Island, British Columbia, Canada

Flip Nicklin / Bowhead Whale (Balaena mysticetus), Baffin Island, Canada

Flip Nicklin / Bowhead Whale (Balaena mysticetus) underwater, Baffin Island, Canada

Flip Nicklin / Bowhead Whale (Balaena mysticetus) diving, Baffin Island, Canada

Flip Nicklin / Sperm Whale (Physeter macrocephalus) researcher Hal Whitehead in crows nest spotting whales, Sri Lanka

Flip Nicklin / Bottlenose Dolphin (Tursiops truncatus) silhouetted with snorkeler, Dolphin Quest Learning Center, Waikoloa Hyatt, Hawaii

Flip Nicklin / Bottlenose Dolphin (Tursiops truncatus) silhouetted with two swimmers, Hawaii

Flip Nicklin / Bowhead Whale (Balaena mysticetus), Baffin Island, Canada

Tui De Roy / Volcan Alcedo Giant Tortoise (Chelonoidis nigra vandenburghi) wallowing in temporary rainy season pool, Alcedo Volcano, Isabella Island, Galapagos Islands, Ecuador

Tui De Roy / Hexagonal crystallization fissures in 100 kilometer wide, 500 kilometers thick and 12,000 year old Salar de Uyuni salt pan, altiplano, Potosi District, Bolivia

Tui De Roy / Red-footed Booby (Sula sula) and Swallow-tailed Gull (Larus furcatus) colony seen from the summit of Wolf Island, Galapagos Islands, Ecuador

Flip Nicklin / Variety of corals on reef and schooling fish, Gray's Reef National Marine Sanctuary, Georgia

Flip Nicklin / Gray Whale (Eschrichtius robustus) bottom feeding, Vancouver Island, British Columbia, Canada

Norbert Wu / The Rock Islands of Palau, the limestone islands have been eroded into mushroom-like formations

Norbert Wu / Purple Sea Urchin (Strongylocentrotus purpuratus) barrens, population explosion destroys once lush Kelp forest, southern California

Flip Nicklin / Gray Whale (Eschrichtius robustus) bottom feeding, Vancouver Islands, British Columbia, Canada

Flip Nicklin / Gray Whale (Eschrichtius robustus) bottom feeding, Vancouver Island, British Columbia, Canada

Tui De Roy / Frailejones (Espeletia hartwegiana) specialized composite plant growing in Paramo Del Angel, a high elevation wet Paramo Grassland, Paramo Del Angel, northern Andes Mountains, Ecuador

Tui De Roy / Black-footed Albatross (Phoebastria nigripes) courtship dance sequence, Midway Atoll, Hawaii

Flip Nicklin / Variety of corals on reef, Grey's Reef National Marine Sanctuary, Georgia

Flip Nicklin / Coral and schooling fish, Gray's Reef National Marine Sanctuary, Georgia

Flip Nicklin / Dwarf Minke Whale (Balaenoptera acutorostrata) researcher Alistair Birtles photographs whale near Great Barrier Reef, Australia

Tui De Roy / Palmyra Atoll, a wet, equatorial atoll with fringing reefs, native forests and abundant seabirds, Palmyra Atoll National Wildlife Refuge, US Line Islands

Flip Nicklin / Dwarf Minke Whale (Balaenoptera acutorostrata) researcher Monique Matthews photographing curious whale near the Great Barrier Reef, Australia

Flip Nicklin / Humpback Whale (Megaptera novaeangliae) mother and calf underwater, Tonga

Flip Nicklin / Humpback Whale (Megaptera novaeangliae) mother and calf underwater, Tonga

Flip Nicklin / Atlantic Spotted Dolphin (Stenella frontalis) pair underwater, Bahamas

Flip Nicklin / Bottlenose Dolphin (Tursiops truncatus) interacting with children at Dolphin Quest Learning Center program, Waikoloa Hyatt, Hawaii

Flip Nicklin / Bottlenose Dolphin (Tursiops truncatus) underwater, Waikoloa Hyatt, Hawaii

Flip Nicklin / Bottlenose Dolphin (Tursiops truncatus) group underwater, captive animal, Hawaii

Flip Nicklin / Bottlenose Dolphin (Tursiops truncatus) trio underwater, Waikoloa Hyatt, Hawaii

Flip Nicklin / Bottlenose Dolphin (Tursiops truncatus) underwater pair, Hawaii

Konrad Wothe / Chamomile (Anthemis arvensis) and Corn Poppy in flowering meadow, Italy

Konrad Wothe / Common Sunflower (Helianthus annuus) with blue sky behind, Germany

Pete Oxford / Fig (Ficus sp) tree in rainforest, Yasuni National Park, Amazon, Ecuador

Rick Tomlinson / An aerial view of yachts using a fish eye lens of Fort Lauderdale during the Whitbread Round the World, 1997.

Tui De Roy / Emperor Penguin (Aptenodytes forsteri), Prydz Bay, eastern Antarctica

Tui De Roy / Emperor Penguin (Aptenodytes forsteri) pair, Prydz Bay, eastern Antarctica

Tui De Roy / Emperor Penguin (Aptenodytes forsteri), Prydz Bay, eastern Antarctica

Pete Oxford / Salt Pan, Makgadikgadi Pans, Kalahari Desert, Botswana

Pete Oxford / Longleaf Pine (Pinus palustris) tree with cone at base, Georgia

Pete Oxford / Longleaf Pine (Pinus palustris) forest, Georgia

Matthias Breiter / Tent on snow, Banks Island, Canada

Colin Monteath / Cavernous weathering in sandstone boulder, Kaikoura, North Canterbury, New Zealand

Roberto Rinaldi / Fish-eye lens aerial view of the Amedee Lighthouse, built under Napoleon III, surrounded by coral reef, New Caledonia, Melanesia. ^^^The Phare Amedee marine reserve is renowned for its scuba diving si...

Colin Monteath / Snake charmers with Cobras (Naja sp) in front of Palace of the Winds, Jaipur, Rajasthan, India

Colin Monteath / Pipi shells at low tide, Mason Bay, Rakiura National Park, Stewart Island, New Zealand

Colin Monteath / Taxidermist who works on thar, chamois, and deer in South Canterbury, New Zealand

Colin Monteath / Avenue of trees, historic Wanaka Homestead, autumn, central Otago, New Zealand

Colin Monteath / Eroded limestone boulders in winter, popular rock climbing and bouldering location near Christchurch, Castle Hill Basin, New Zealand

Colin Monteath / Eroded limestone boulders in winter, popular rock climbing and bouldering location near Christchurch, Castle Hill Basin, New Zealand

Colin Monteath / Adelie Penguin (Pygoscelis adeliae) group walking amid bergy bits on Brown Bluff beach near Hope Bay, Antarctic Sound, Antarctica

Flip Nicklin / Humpback Whale (Megaptera novaeangliae) swimming upside down at surface, Hawaii

Mike Parry / Crocodile (Crocodylus sp) attack victim, Port Moresby, Papua New Guinea

Mike Parry / Crocodile (Crocodylus sp) attack victim, Port Moresby, Papua New Guinea

Jim Brandenburg / Viking graffiti scars a balustrade in Hagia Sophia, a former church which is now a museum, Istanbul, Turkey

Jim Brandenburg / Boots with bones, White Sands National Park, New Mexico

Flip Nicklin / Dwarf Minke Whale (Balaenoptera acutorostrata) researchers photograph whale from tow line, near Great Barrier Reef, Australia

Norbert Wu / Coral reef damaged by dynamite fishing has not recovered in 20 years, Similan Islands, Thailand

Norbert Wu / Diver snorkeling around tropical island, Solomon Islands

Tui De Roy / Laysan Albatross (Phoebastria immutabilis) tracks on beach around Scaevola bushes, Midway Atoll, Hawaii

Tui De Roy / Laysan Albatross (Phoebastria immutabilis) pair nesting around water cisterns near runway, Midway Atoll, Hawaii

Norbert Wu / Atlantic Spotted Dolphin (Stenella frontalis) silhouetted group swimming overhead, Little Bahama Bank, Caribbean

Flip Nicklin / Bowhead Whale (Balaena mysticetus) underwater, Baffin Island, Canada

Flip Nicklin / Bowhead Whale (Balaena mysticetus) underwater, Baffin Island, Canada

Norbert Wu / Gray Snapper (Lutjanus griseus) school under boat, and scuba diver, Hol Chan Marine Reserve, Ambergris Caye, Belize

Flip Nicklin / Humpback Whale (Megaptera novaeangliae) mother and calf underwater, Tonga

Konrad Wothe / Chamomile (Anthemis arvensis) and Corn Poppy in flowering meadow, Italy

David Noton / River Lison fish-eye lens Jura France

Colin Monteath / Cavernous weathering in sandstone boulder, Kaikoura, North Canterbury, New Zealand

Flip Nicklin / Manta Ray (Manta birostris) flower Garden Banks National Marine Sanctuary, Louisiana, Gulf of Mexico