Gavin Hellier / Cobbled street lined with colourful houses known as Kujundziluk, one of the oldest streets in Mostar leading to the Old Bridge, Old Town, Mostar, Herzegovina, Bosnia and Herzegovina, Balkans, 2007. No...

Laurent Geslin / Wood pigeon (Columba palumbus) on grass near busy road, Paris, France. April.

David Woodfall / Man standing outside building in pouring rain, Ganges delta, Bangladesh, November 2008

Mark Moffett / Galapagos Giant Tortoise (Chelonoidis nigra) in Alcedo Volcano, Isabella Island, Galapagos Islands, Ecuador

Jim Brandenburg / Giant Sequoia (Sequoiadendron giganteum), General Sherman tree in Sequoia National Park, California

Tui De Roy / Pinta Island Galapagos Tortoise (Chelonoidis nigra abingdoni), Lonesome George, the last survivor of his race, Darwin Reserve Station, Santa Cruz Island, Galapagos Islands, Ecuador

Richard Du Toit / African Elephant (Loxodonta africana) old male browsing, Kruger National Park, South Africa

Ingo Arndt / Old cemetery during high winds, Prince Olav Harbour, South Georgia Island

Mark Raycroft / Golden Retriever (Canis familiaris) three generations, elderly, adult and puppy

Mark Raycroft / Golden Retriever (Canis familiaris) males in snow, one elderly with white muzzle

Hiroya Minakuchi / Stromatolites exposed at low tide, colonies of blue-green algae, the oldest life form that still exists today fossils dated to over three billion years ago, Hamelin Pool, Shark Bay, Western Australia

Konrad Wothe / Cephalopod fossil split in half

Winfried Wisniewski / Brown Bear (Ursus arctos) old male in bog, northeast Finland

Sergey Gorshkov / African Lion (Panthera leo) old male with scars, Botswana

Suzi Eszterhas / Chimpanzee (Pan troglodytes) alpha male, Ngamba Island Chimpanzee Sanctuary, Uganda

Flip Nicklin / Old whaling ships stranded in abandoned whaling station, Leith, South Georgia Island

Ingo Arndt / Pterosaurian (Rhamphorhynchus longicaudus) fossil, about 150 million years old, Solnhofen, Bavaria, Germany

Ingo Arndt / Dragonfly (Tarsophlebia eximia) fossil, about 150 million years old, Solnhofen, Bavaria, Germany

Mark Moffett / Ant (Gigantiops destructor), freshly emerged pale individual next to black older worker

Mark Moffett / Bulldog Ant (Myrmecia gulosa) nest excavated by Robert Taylor, eastern Australia

Winfried Wisniewski / African Lion (Panthera leo), old and young males, Masai Mara National Reserve, Kenya

Rick Tomlinson / Adult chinstrap penguin (Pygoscelis antarctica), Yankee Harbour, Antarctica, January 2007

Tim Fitzharris / Foxtail Pine (Pinus balfouriana) tree, known as Methuselah, is over 4800 years old, White Mountains, Inyo National Forest, California

Tim Fitzharris / Stronghold House with Sleeping Ute Mountain, Hovenweep National Monument, Utah

Tim Fitzharris / Hovenweep Castle at Little Ruin Canyon on sandstone cliff, Hovenweep National Monument, Utah

Tim Fitzharris / Hovenweep Castle at Little Ruin Canyon on sandstone cliff, Hovenweep National Monument, Utah

Tim Fitzharris / Hovenweep Castle at Little Ruin Canyon, Hovenweep National Monument, Utah

Ingo Arndt / Baobab (Adansonia digitata) tree, Dogon man peeling bark for making rope, Sahel Desert, Mali, West Africa

Patricio Robles Gil / Elephant Tree (Bursera microphylla) on hillside, Las V?rgenes Volcano, El Vizca?no Biosphere Reserve, Baja California, Mexico

Colin Monteath / Satellite tower and chortens, showing contrast between ancient and modern near Leh, Ladakh, northwest India

Konrad Wothe / Old red barn in pastoral landscape, Oregon

Konrad Wothe / Old red barn in pastoral landscape, Oregon

Tim Fitzharris / Mormon Row Barn, Grand Teton National Park, Wyoming

Tim Fitzharris / Foxtail Pine (Pinus balfouriana) tree, ancient trees, Schulman Grove, White Mountains, California

Tim Fitzharris / Foxtail Pine (Pinus balfouriana) tree, twisted trunk of an ancient tree, Sierra Nevada, California

Tim Fitzharris / Foxtail Pine (Pinus balfouriana) tree, twisted trunk of an ancient tree, Sierra Nevada, California

Tim Fitzharris / Foxtail Pine (Pinus balfouriana) tree, twisted trunk of an ancient tree, Sierra Nevada, California

Mark Raycroft / Black Labrador Retriever (Canis familiaris) portrait of an adult sitting in the snow

Mark Raycroft / Elderly Boxer (Canis familiaris) older fawn with graying mask laying in grass

Flip de Nooyer / Ancient blue iceberg, detail, Antarctica

Heidi & Hans-Juergen Koch / American Alligator (Alligator mississippiensis) old adult resting on the shore of a pond, Florida

Konrad Wothe / Tree Ferns growing near Bullock Creek, Paparoa National Park, South Island, New Zealand

Gerry Ellis / Sitka Spruce (Picea sitchensis) in old growth forest, Queen Charlotte Islands, British Columbia, Canada

Yva Momatiuk & John Eastcott / Alaska Moose (Alces alces gigas) old bull feeds in glacial kettle pond, Denali National Park and Preserve, Alaska

Gerry Ellis / Elderly woman separating rice seed from husk, mountain village above Pokhara, Nepal

Gerry Ellis / Sandstone blocks of White Pyramid of King Snefru at Dakshur, Egypt

Konrad Wothe / Tuatara (Sphenodon punctatus) portrait, the only surviving species of an order that flourished 200 million years ago, New Zealand

Konrad Wothe / Tuatara (Sphenodon punctatus) portrait, the only surviving species of an order that flourished 200 million years ago, New Zealand

Konrad Wothe / Tuatara (Sphenodon punctatus) portrait, the only surviving species of an order that flourished 200 million years ago, New Zealand

Gerry Ellis / Chimpanzee (Pan troglodytes) male portrait, native to central and west forested Africa

Konrad Wothe / Orangutan (Pongo pygmaeus) old male hanging in tree, Tanjung Puting National Park, Borneo

Tui De Roy / Galapagos Giant Tortoise (Chelonoidis nigra) large male on caldera rim, caldera rim, Alcedo Volcano, Isabella Island, Galapagos Islands, Ecuador

Flip Nicklin / Sperm Whale (Physeter macrocephalus) caught by whalers depicted in Scrimshaw

Tui De Roy / Saddleback Galapagos Tortoise (Chelonoidis nigra hoodensis) old male in arid caldera, Pinzon Island, Galapagos Islands, Ecuador

Larry Minden / Pinzon Island Tortoise (Chelonoidis nigra ephippium) male eating Opuntia (Opuntia sp) cactus pad, Pinzon Island, Galapagos Islands, Ecuador

Larry Minden / Pinzon Island Tortoise (Chelonoidis nigra ephippium) male eating Opuntia (Opuntia sp) cactus pad, Pinzon Island, Galapagos Islands, Ecuador

Larry Minden / Pinzon Island Tortoise (Chelonoidis nigra ephippium) large old male, Pinzon Island, Galapagos Islands, Ecuador

Larry Minden / Pinzon Island Tortoise (Chelonoidis nigra ephippium) large old tortoise resting in the depression of his shell which is used as overnight shelter, Pinzon Island, Galapagos Islands, Ecuador

Mark Moffett / Cathedral of Luxor, Egypt

Mark Moffett / Hieroglyphs cover pillars of Karnak Temple, Valley of the Kings, Egypt

Ingo Arndt / Abandoned whaling vessel at night, Grytviken, South Georgia Island

Mark Raycroft / Golden Retriever (Canis familiaris) males with sunflowers, one elderly with white muzzle

Grant Dixon / Old digesters used to extract oil from penguins and seals, Macquarie Island, Tasmania, Australia

Ingo Arndt / Blue iceberg, Weddell Sea, Antarctica

Colin Monteath / Ancient blue iceberg near Sandwich Islands, Scotia Sea, Antarctica

Flip de Nooyer / Detail of ancient blue ice in Cumberland West Bay, South Georgia Island

Thomas Mangelsen / African Elephant (Loxodonta africana) male grazing, Kenya

Mark Moffett / Elderly man with turban, Zahedan, Iran

Jim Brandenburg / Elderly man laughing, Harbin, China

Michio Hoshino / Athabaskan Indian woman, 112 years old, Alaska

Mark Moffett / Ruins of villas built by French colonials that were bombed by Vietnamese partisans in the mid-1950's, Tam Dao National Park, Vietnam