Juan Manuel Borrero / Illustration of human evolution from left to right Australopithecus afarensis, Australopithecus africanus, Homo erectus and Homo sapiens. Pencil and watercolor painting.

Paul D Stewart / Chromolithograph illustration of Cromagnon 'Skull of an old man' Plate 1, Section C. Edouard Lartet and Henry Christy. 'Reliquiae Aquitanicae' 1865-1875, Williams and Norgate, London 1875..

Paul D Stewart / Engraving of an ape-like cave man accompanying an article by Boitard in the French 'Magasin Universel' (April 1838). This is the earliest reconstruction of a pre-historic human. It is striking that it...

Niall Benvie / 2020VISION / Children from Lochinver primary school being shown how to plant trees on moorland at Culag Wood, Sutherland, Highlands, Scotland, UK, January 2011

Niall Benvie / 2020VISION / Children from Lochinver primary school planting trees on moorland at Culag Wood, Sutherland, Highlands, Scotland, UK, January 2011

Ben Hall / 2020VISION / Young girl looking at bluebell flower, The National Forest, Midlands, April 2011, Model released. Did you know? The National Forest is a pioneering project in the heart of the Midlands. Each year more...

Ben Hall / 2020VISION / Young girl showing her grandfather a bluebell flower, The National Forest, Midlands, April 2011, Model released. 2020VISION Exhibition. Did you know? At the beginning of the 20th century special 'Blue...

Wild Wonders of Europe / Munier / Man at Roros market which has been there since 1854, exhibitors and vendors come from a long way off, travelling by horse and sleigh, -35 degrees centigrade, Dovrefjell National Park, Norway, February...

Niall Benvie / Why biodiversity matters. Person pulling labelled wooden block from game of Jenga, all blocks above will come tumbling down, Scotland, UK, 2007

Pete Oxford / Buttress root in rainforest with photographer Pete Oxford standing beneath it, Sacha Lodge, Amazon Rain Forest, Ecuador

Suzi Eszterhas / Hot air balloon flying over wildebeest herd, Masai Mara Triangle, Kenya

Ingo Arndt / Researcher Jim Lewis curator of the true bug collection at INBio, San Jose, Costa Rica

Ingo Arndt / Two scientists from the Alfred-Wegener Institute, collecting tide pool samples, North sea, Helogland, Germany

Suzi Eszterhas / Polar Bear (Ursus maritimus) three to four month old cub peeking over mother's body while she is tranquilized by researchers, vulnerable, Wapusk National Park, Manitoba, Canada

Michael Durham / Bumblebee (Bombus morrisoni) queen, flying toward Sweet Pea flowers in the Deschutes National Forest, Oregon

Piotr Naskrecki / Ogre-faced Spider (Deinopis sp) do not wait passively for an insect to fall into their web, instead, they cast sticky nets, La Selva Biological Station, Costa Rica

Colin Monteath / Hiker looking at Mt Cook, known locally as Aoraki, from Malte-Brun, Southern Alps, New Zealand

Colin Monteath / Mt Sefton, climber at dawn above Mueller hut and cloud-filled Mueller Glacier, Mt Cook National Park, New Zealand

Pete Oxford / Burchell's Zebra (Equus burchellii) herd drinking at waterhole, Africa

Pete Oxford / Child selling necklaces on the beach made from seeds and shells found locally, Mangily, near Ifaty, southwestern Madagascar

Pete Cairns / Three boys playing in forest, Cairngorms National Park, Scotland, UK 2006 Model released.

Pete Cairns / Young boy peering around Birch tree, Cairngorms, Scotland, UK Model released.

Pete Cairns / Woman lying barefoot in field of daisies, enjoying nature on a summer day, Cairngorms National Park, Scotland, UK. Soles of feet visible Model released.

Staffan Widstrand / Robert Mulluk Sr, portrait, 73 years old, Kobuk Valley NP, Alaska, USA

Staffan Widstrand / Child, Olle Collinder, watching marine life through snorkel, Bohuslan, Sweden. Model released.

Flip Nicklin / Whale Shark (Rhincodon typus) surrounded by several scuba divers, threatened, Cocos Island, Costa Rica

Flip Nicklin / Two scuba divers swimming through sea cave with schooling Grunts, Cocos Island, Costa Rica

Mitsuaki Iwago / African Lion (Panthera leo) females working together to take down a Cape Buffalo (Syncerus caffer), Serengeti National Park, Tanzania

Mark Moffett / Meg Lowman strides across a canopy raft to collect insect samples with her net as Bruce Rinker inspects the previous catch, Cameroon

Yva Momatiuk & John Eastcott / Leopard (Panthera pardus) large male resting after hunt and devouring its kill, Masai Mara National Reserve, Kenya

Gerry Ellis / African Elephant (Loxodonta africana) orphan, Maluti, six months old, charging camera, David Sheldrick Wildlife Trust, Tsavo East National Park, Kenya

Gerry Ellis / African Lion (Panthera leo) kill surrounded by tourists, Tanzania border, Kenya

Tui De Roy / Glacier with tourist expedition in inflatable zodiac, southern Greenland Fjords, Greenland

Jabruson / Rwandan children laughing, Kinigi, Parc des Volcans NP, Rwanda

Colin Monteath / Hiker, Cerro Torre and Fitzroy reflected in small pond at dawn, Loma Plieque Tumbado, Los Glaciares National Park, Patagonia, Argentina

Bob Barbour / Man overlooking stormy surf on rocks, northern California

Bob Barbour / Jay Moriarity, September 1996, central coast, California

Bob Barbour / Surfer known as 'Wingnut, ' Costa Rica

Bob Barbour / Right hand drive 1937 Ford Woodie, owned by Michael and Ilona Hemperly, Haleiwa, Oahu, Hawaii

Bob Barbour / Homer Henard, December 1997, central coast, California

Bob Barbour / Surfer rides wave, Pipeline, Oahu, Hawaii

Gerry Ellis / African Elephant (Loxodonta africana) orphans with keepers, led by Natumi back to stockade, David Sheldrick Wildlife Trust, Tsavo East National Park, Kenya

Colin Monteath / Mountaineer enjoying the view of Mt Everest and the Himalayan Mountains at sunset from Gokyo Ri, Khumbu, Nepal

Yva Momatiuk & John Eastcott / Lone hiker walking along the base of a sandstone butte strong pattern of wavy lines in petrified sand dunes are exposed by erosion, Vermilion Cliffs National Monument, Colorado Plateau, Utah

Yva Momatiuk & John Eastcott / Lone hiker walking along the base of a sandstone butte strong pattern of wavy lines in petrified sand dunes are exposed by erosion, Vermilion Cliffs National Monument, Colorado Plateau, Utah

Yva Momatiuk & John Eastcott / Lone hiker walking on colorful sandstone strong pattern of wavy lines in petrified sand dunes are exposed by erosion, Vermilion Cliffs National Monument, Colorado Plateau, Utah

Yva Momatiuk & John Eastcott / Alaska Range in spring snow, photographer resting in valley below mountains, Denali National Park and Preserve, Alaska

Yva Momatiuk & John Eastcott / Coyote (Canis latrans) looking for handouts from tourists, Mather Point parking lot on South Rim, Grand Canyon National Park, Arizona

Pete Oxford / Chagras or cowboys on an overnight ride at a hacienda during the annual cattle round-up, with Mt Antisana in the background, Ecuador

Yva Momatiuk & John Eastcott / Red rubber boat with two expedition members circle floating iceberg, summer season, Labrador Sea, Labrador, Canada

Thomas Mangelsen / Monarch (Danaus plexippus) butterfly group perching on a female tourist, El Rosario Monarch Butterfly Sanctuary, Mexico

Colin Monteath / Humpback Whale (Megaptera novaeangliae) observed by tourists in a zodiac boat near Melchoir Island, Antarctic Peninsula, Antarctica

Colin Monteath / Climber enjoying view of Mt CookÆs Caroline Face from Ball Pass, Mt Cook National Park, New Zealand

Michael & Patricia Fogden / Brilliant trail with hiker, Monteverde Cloud Forest Reserve, Costa Rica

Tim Fitzharris / Tourists viewing Grand Prismatic Pool, Midway Geyser Basin, Yellowstone National Park, Wyoming

Bob Barbour / Terry Simms, central coast, California

Bob Barbour / Josh mulcoy, December 1997, central coast, California

Bob Barbour / Omar Etcheverry, October 1997, central coast, California

Bob Barbour / Sean Hayes, March 1998, Rocky Point, Oahu, Hawaii

Colin Monteath / Climber hauls load above 4,200 meter camp on the west buttress route of Mt Denali or Mt McKinley which reaches 6,194 meters elevation, Denali National Park and Preserve, Alaska

Colin Monteath / Climber on the summit of Pik Kommunizma at 7,500 meters elevation, highest mountain in the Pamirs, a mountain range in Tajikistan, central Asia

Colin Monteath / Mt Aspiring and hiker reflected in lake at dawn, Cascade Saddle, Mt Aspiring National Park, New Zealand

Pete Oxford / Chagra cowboys herding cattle and burning the hillsides to keep cattle on the move and rejuvenate the pasture at a hacienda during the annual overnight cattle round-up, Andes Mountains, Ecuador

Pete Oxford / Chagra cowboy portrait with roses in his hat band, on an overnight ride at a hacienda to herd cattle, Andes Mountains, Ecuador

Konrad Wothe / Tourists on Russian icebreaker breaking through pack ice, Antarctica

Konrad Wothe / Ice climber on Perito Moreno Glacier, Los Glaciares National Park, Argentina

Michael & Patricia Fogden / Children in the Monteverde Cloud Forest Reserve, Costa Rica

Claus Meyer / Visitors explore an expansive cavern with stalactites, Vale Do Peruacu, Minas Gerais, south Cerrado savannah, Brazil

Pete Oxford / Two Chagra cowboys on an overnight ride at a hacienda to herd cattle, Andes Mountains, Ecuador

Konrad Wothe / Gray Whale (Eschrichtius robustus) breaching while tourists watch, Mexico

Konrad Wothe / Cardon (Pachycereus pringlei) cactus photographed by tourist, largest cacti in the world and may live over 200 years, Sonoran Desert, Baja California, Mexico

Norbert Wu / Scuba diver exploring ice caves below Weddell Seal (Leptonychotes weddellii) breathing holes, life below feeds on seal feces, Antarctica

Norbert Wu / Great White Shark (Carcharodon carcharias) near divers in shark cage, Australia

Patricio Robles Gil / Aboriginal man with his face painted for the Mt Hagen cultural show, Papua New Guinea

Patricio Robles Gil / Aboriginal man wearing tribal headdress costume for the Mt Hagen cultural show, Papua New Guinea

Patricio Robles Gil / Aboriginal man wearing tribal headdress made with feathers from Bird-of-Paradise, Parrots and Lorikeets, Papua New Guinea

Matthias Breiter / Two climbers at Ruth Glacier, with Mt McKinley towering above them, Denali National Park and Preserve, Alaska

Norbert Wu / Scuba diver and salp chain showing asexual reproduction of salps, southern California

Norbert Wu / Scuba diver among colorful corals

Norbert Wu / Medusa (Desmonema glaciale) near the surface, bell can reach over one meter in diameter, Antarctica

Mark Moffett / Fire Ant (Solenopsis geminata) colony with queen ant, workers and pupae, Florida

Mark Moffett / Fire Ant (Solenopsis geminata) nest showing large queen, workers and pupa, Florida

Michael Quinton / Common Raven (Corvus corax) checking out tourist, Yellowstone National Park, Wyoming

Norbert Wu / Atlantic Spotted Dolphin (Stenella frontalis) swimming with Katherine Gilman, Little Bahama Bank, Caribbean

Flip Nicklin / Orca (Orcinus orca) leaping, watched by tourists from Stubbs Island charter boat, Johnstone Strait, northeast Vancouver Island, Canada

Flip Nicklin / Humpback Whale (Megaptera novaeangliae) filmed by diver Chuck Nicklin, Maui

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

Tui De Roy / Galapagos Sea Lion (Zalophus wollebaeki) checking out tourist, Mosquera Island, Galapagos Islands, Ecuador

Tui De Roy / Galapagos Sea Lion (Zalophus wollebaeki) group photographed by tourists, Gardner Bay, Hood Island, Galapagos Islands, Ecuador

Tui De Roy / Galapagos Penguin (Spheniscus mendiculus) playing with snorkeler, Bartolome Island, Galapagos Islands, Ecuador

Michio Hoshino / Illuminated tent beneath snow-covered mountains and Aurora borealis, Alaska

Flip Nicklin / Blue Whale (Balaenoptera musculus) with researcher Bruce Mate on boat attempting to attach satellite tag, Santa Barbara, California

Flip Nicklin / Blue Whale (Balaenoptera musculus) with researcher Bruce Mate on boat attempting to attach satellite tag, Santa Barbara, California

Flip Nicklin / Blue Whale (Balaenoptera musculus) with researcher Bruce Mate attempting to attach satellite tag, Santa Barbara, California

Norbert Wu / Atlantic Spotted Dolphin (Stenella frontalis) playing with Poppi Gilman, Little Bahama Bank, Caribbean

Norbert Wu / Weddell Seal (Leptonychotes weddellii) breathing hole is above this ice cave with diver, the cave is filled with Sea Stars (Odontaster validus) that feeds on seal feces, Antarctica