Solvin Zankl / 'Femeiche' the Court Tree at night, an ancient English oak (Quercus robur) used in the Middle ages as Vehmic or secret court in which serious criminals were judged and executed. Erle, Germany, Octobe...

Ross Hoddinott / 2020VISION / Tarr Steps, medieval clapper bridge crossing the River Barle, Exmoor National Park, Somerset, UK. May 2012

David Tipling / 2020VISION / Phragmites reeds (Phragmites australis) at dawn in late autumn sun, Woodwalton Fen, Cambridgeshire, UK, October. Did you know? Woodwalton Fen is an example of ancient fen, most of which disappeared...

Ann & Steve Toon / Baby African elephants (Loxodonta africana) of various ages playing together, Addo national park, Eastern Cape, South Africa, January. Did you know? Elephants can tell the difference between different...

Jerry Monkman / Three young girls (ages 3, 5, 9) in a rowing boat at Oliver Lodge, Lake Winnipesauke, Meredith, New Hampshire, USA. Model Released. July 2008

Jerry Monkman / Two children (ages 4 and 6) walking across a wooden suspension bridge, Lincoln's Woods Trail, White Mountains National Forest, New Hampshire, USA. Model Released. October 2007

Andy Rouse / Asian elephant (Elaphus maximus) two calves of different ages walking side by side, Minneria NP, Sri Lanka

Karine Aigner / Barn owl (Tyto alba), six owlets of varying ages sitting in nest at bottom of abandoned hunting blind. Texas, USA. April.

Eric Baccega / Lioness (Panthera leo) with suckling cubs of different ages, early morning, South Luangwa National Park, Zambia.

Eric Baccega / Lioness (Panthera leo) with suckling cubs of different ages, early morning, South Luangwa National Park, Zambia

Stefan Christmann / Emperor penguin (Aptenodytes forsteri) chick ages 1-3 weeks lying dead on sea ice. Atka Bay, Antarctica. August.

Philippe Clement / Wooden box with replicas of horse teeth of all ages, as a guide to aging horses. Their teeth get longer with age

Tui De Roy / Red-footed Booby (Sula sula) chicks of different ages in nest, Gardner Islet, Floreana Island, Galapagos Islands, Ecuador

Eric Baccega / African elephant (Loxodonta africana) calves of different ages playing and chasing each other, Matusadona National Park, Zimbabwe

Eric Baccega / African elephant (Loxodonta africana) calves of different ages playing and chasing each other, Matusadona National Park, Zimbabwe

Eric Baccega / African elephant (Loxodonta africana) calves of different ages playing and chasing each other, Matusadona National Park, Zimbabwe

Eric Baccega / African elephant (Loxodonta africana) calves of different ages playing and chasing each other, Matusadona National Park, Zimbabwe

Yva Momatiuk & John Eastcott / Angolan Giraffe (Giraffa giraffa angolensis) males of different ages at waterhole in dry season, Etosha National Park, Namibia

Nick Turner / Flock of Cotswold Lions rare breed sheep (Ovis aries), Naunton, Gloucestershire, UK. Introduced by the Romans in Middle Ages for their wool which became known as Golden Fleece. October.

Paul D Stewart / Woodblock illustration of Sea Hares from Ortus (Hortus) Sanitatis 1491 - translated from the Latin as 'Garden of Health'. During the middle ages all manner of land animals were thought to have their o...

Paul D Stewart / 1491 Woodblock illustration of from Ortus (Hortus) sanitatis - translated from the Latin as 'Garden of Health'. Shows an apothecary removing a toad stone bezoar from a large toad's 'third eye'. Toad s...

Paul D Stewart / 1491 Woodblock illustration of a from Ortus (Hortus) sanitatis - man taking a cure for snake bite. Hortus Sanitatis translates from the Latin as 'Garden of Health'. The Hortus was the first printed na...

Paul D Stewart / Woodblock illustration from Ortus (Hortus) sanitatis - translated from the Latin as 'Garden of Health'. Showing the snake Cerastes and the cyanocephalus dog headed man. The Hortus was the first printe...

Paul D Stewart / Woodblock illustration of a Phoenix in her nest of fire from Ortus (Hortus) Sanitatis 1491- translated from the Latin as 'Garden of Health'. The Hortus was the first printed natural history encyclopa...

Paul D Stewart / Woodblock illustration, the first printed image of a falconer with hawks, from Ortus (Hortus) Sanitatis 1491 - translated from the Latin as 'Garden of Helath'. The Hortus was the first printed natural...

Paul D Stewart / Woodblock illustration of Camels from Ortus (Hortus) Sanitatis 1491 - translated from the latin as 'Garden of Health'. This is the first printed illustration of a camel in literature. The Hortus was...

Paul D Stewart / Woodblock illustration of a camel from Ortus (Hortus) sanitatis 1491 - translated from the Latin as 'Garden of Health'. This is the first printed illustration of a camel in literature. The Hortus was...

Paul D Stewart / Woodblock illustration of Mandrake (Mandragora) from two pages of the Ortus (Hortus) sanitatis - translated from the Latin as 'Garden of Health' by Jacob Meydenbach, 1491. He describes plants and anim...

Paul D Stewart / Photograph of Jean Louis Rodolphe Agassiz (1807-1873) shown teaching at a blackboard. Agassiz was a Swiss- American palaeontologist, geologist and glaciologist, and the main opponent to Darwin's Theor...

Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) adolescent male 'Tarzan' aged 12 years grooming infant male 'Gizmo' ages 3 years with female 'Golden' aged 14 years and her baby daughter 'Glama' a...

Eric Baccega / Students of different ages studying in the same class, Etanga School, Kaokoland, Namibia. October 2015

Solvin Zankl / 'Femeiche' the Court Tree at night, an ancient English oak (Quercus robur) used in the Middle ages as Vehmic or secret court where serious criminals were judged and executed. Erle, Germany, October 20...

Anup Shah / African Elephant (Loxodonta africana) female and calves of different ages, Masai Mara, Kenya

Enrique Lopez-Tapia / Elderly Borona woman, with her young grandson. Ethiopia, November 2014

Enrique Lopez-Tapia / Elderly Borona woman, with her young grandson. Ethiopia, November 2014

Enrique Lopez-Tapia / Elderly Borona woman, with her young grandson. Ethiopia, November 2014

Anup Shah / Lion (Panthera leo) cubs of various ages on the move. Maasai Mara National Reserve, Kenya.

Brent Stephenson / Gaggle of feral Domestic geese (Anser anser) swimming across a pond. Mixture of ages and sexes. Te Awanga Lagoon, Hawkes Bay, New Zealand, November.

Jeff Vanuga / African elephants (Loxodonta africana) family, Samburu National Reserve, Kenya, Africa.

Donald M. Jones / Bighorn Sheep (Ovis canadensis) rams at different ages, western Montana

John Waters / Clapper bridge made from slabs of granite crossing the River Dart at Dartmeet, Dartmoor National Park, Devon, UK. The bridge probably dates back to medieval times and it has been rebuilt several time...

Juan Manuel Borrero / Cloister of the Santes Creus Monastery, Tarragona Province, Spain, May

Juan Manuel Borrero / Cloister of the Santes Creus Monastery, Tarragona Province, Spain, May

Anup Shah / African lion (Panthera leo) cubs of varying ages playing on a fallen tree, Masai Mara National Reserve, Kenya, September

Nick Upton / Dense gathering of Common periwinkles (Littorina liitorea) of all ages in a rockpool lined with Coralweed (Corallina officinalis) and Irish moss (Chondrus crispus), North Berwick, East Lothian, July

Jean E. Roche / Aerial view of old gateway tower in Aigues-Mortes marshes controlling salt sale and transport in the Middle Ages, Camargue, Southern France, May 2009

Nick Upton / 2020VISION / Common cockchafer / Maybug (Melolontha melolontha), taking off from human finger in a garden, with house in the background, Wiltshire, England, UK, May . Property released. Did you know? In the Middle...

Inaki Relanzon / Town of Avila with walls from the middle-ages. Central Spain, March 2011.

Andy Rouse / 2020VISION / Wild boar (Sus scrofa) inquisitive piglet, Forest of Dean, Gloucestershire, UK, March. Did you know? In the Middle Ages Wild boars were considered 'Beasts of Venery', a prestigious quarry only hunted...

Steven Kazlowski / Walruses (Odobenus rosmarus) bulls of various ages resting together on sandspit, along the coast of Svalbard, Atlantic coast.

Jerry Monkman / A young sister and brother (ages 2 and 4) on their way to play on the beach at the Cape Cod National Seashore in Truro, Massachusetts, USA

Jane Burton / Lakeland Terrier x Border Collie pup, 6 months old, with her younger siblings, 6 weeks old

Michael Durham / Rainforest interior - this humid jungle is one of the world's oldest rainforest. It has survived untouched by the ice ages for 130 million years, Endau-Rompin National Park, Malaysia

Michael Durham / Rainforest interior, Endau-Rompin National Park, Malaysia. This humid jungle is one of the world's oldest rainforest. It has survived, untouched by the ice ages, for 130 million years

Mitsuhiko Imamori / Common Pillbug (Armadillidium vulgare) group of four various ages, worldwide distribution

Rod Williams / Mandrill {Mandrillus sphinx} female with young of different ages, captive, from Central Africa

Jean-Pierre Zwaenepoel / Southern plains grey / Hanuman langur {Semnopithecus dussumieri} two mothers with young of different ages, Thar desert, Rajasthan, India

Michael & Patricia Fogden / Treehoppers, adult and several ages of young plus ant guards, dry forest, Guanacaste, Costa Rica

Norbert Wu / Pygmy Sweeper (Parapriacanthus ransonneti) school of mixed ages, Papua New Guinea

Anup Shah / African Elephant (Loxodonta africana) female and calves of different ages, Masai Mara, Kenya

Tui De Roy / Short-tailed Albatross (Phoebastria albatrus) group of mixed ages on water, Torishima Island, Japan

Paul D Stewart / First edition of Erasmus Darwin's 'Zoonomia', Part 1 'The Laws of Organic Life' with section revealing his remarkably prescient 'world without end' text on evolution. Erasmus Darwin was Charles Darwin...

Paul D Stewart / Portrait of Erasmus Darwin (1731-1802) from a picture by Wright of Derby, reproduced with later hand colouring by his grandson, Charles Darwin in 'Life of Erasmus Darwin' 1879 (Ernst Krause co-author)...

Paul D Stewart / Portrait of Gaius Plinius Secundus, army commander, naturalist and author (23AD to 25 August 79AD). Copperplate engraving from Andre Thevet's 'Portraits et vies des hommes illustres' publ Guillaume Ch...

Paul D Stewart / Woodcut illustration of Wolverine (Gulo gulo) or Glutton, squeezing between trees to defecate before resuming feeding. From Conrad Gesner's 'Icones Animalium' published by Christof Froschover, Zurich,...

Paul D Stewart / Red Fox (Vulpes vulpes) portrait detail from a woodcut with old colouring. Conrad Gesner 'Icones Animalium' publ. Christof Froschover, Zurich, 1560. Gesner's artist catches the perceived intelligent a...

Paul D Stewart / Woodcut of Common electric ray (Torpedo torpedo) with old colouring. From Conrad Gesner's 'Icones Animalium' publ. Christof Froschover, Zurich, 1560. The torpedo or electric ray had been well know by...

Paul D Stewart / Woodcut of mythical creature with early colouring from Conrad Gesner's 'Icones Animalium' 1557. Publ. Christof Froshover, Zurich. Gesner takes this image from Breidenbach's 'Journey to the Holy Land'...

Paul D Stewart / Woodcut illustration of mythical creature with contemporary colouring from 'Icones Animalium' Publ. Christof Froschover, Zurich, 1560. Gesner illustrates a creature captured in the forest of Hanesberg...

Paul D Stewart / Woodcut illustration of Crested Porcupine (Hystrix cristata) with colouring. From Gesner's 'Icones Animalium' publ. Christof Froschover, Zurich, 1560. Of Gesner's many woodcuts this is one of the more...

Paul D Stewart / Red Fox (Vulpes vulpes) portrait detail from a woodcut with old colouring. Conrad Gesner 'Icones Animalium' publ. Christof Froschover, Zurich, 1560. Gesner's artist catches the perceived intelligent a...

Paul D Stewart / Woodcut with old colouring of shark and shark tooth fossil from Gesner 'Icones Animalium' publ. Christof Froschover, Zurich, 1560 (also 1558 in Historiae Animalium, Liber IIII). This is the first West...

Paul D Stewart / Woodcut illustration of Flying fish (Exocoetus spp.) with old colouring and paper age toning and staining. From Gesner's 'Icones Animalium' publ. Christof Froschover, Zurich, 1560.

Paul D Stewart / Woodcut with old colouring of fish. Conrad Gesner 'Icones Animalium' publ. Christof Froschover, Zurich, 1560. In marked contrast to his exotica which were often fancifully drawn Gesner's woodcuts of f...

Paul D Stewart / Woodcut illustration with old colouring of Barbary Macaque monkey (Macaca sylvanus) identified as 'Ein Aff' (An ape). From Gesner's 'Icones Animalium' publ. Christof Froschover, Zurich, 1560. The divi...

Paul D Stewart / Woodcut illustration of whale attacking ship, with old colouring. From Gesner's 'Icones Animalium' published by Christof Froschover, Zurich, 1560.

Paul D Stewart / Woodcut illustration of sharks attacking a man, with a ray coming to help, with old colouring. From Gesner 'Icones Animalium' publ. Christof Froschover, Zurich, 1560. This scene is copied by Gesner fr...

Paul D Stewart / Woodcut illustration of Satyrus marinus - a sea monster or mermaid of partially human form, with old colouring. Gesner 'Icones Animalium' publ. Christof Froschover, Zurich, 1560. Gesner reproduced thi...

David Fleetham / Three spot damselfish (Dascyllus trimaculatus) juvenile, swimming beside Mertens' carpet sea anemone (Stichodactyla mertensii) for protection, Yap, Micronesia, Pacific Ocean. Fish loses immunity...

Roland Seitre / Palm cockatoo (Probosciger aterrimus) chicks of various ages and egg, portrait, New Guinea. Captive.

Will Watson / Peterborough Cathedral with the Early English Gothic façade from 13th Century at dusk, Peterborough, Cambridgshire, England, UK, February 2023.

Will Watson / Romanesque carving of The Green Man, carved in the middle ages, St. Michael's Church, Garway, Herefordshire, England, UK.

Will Watson / Romanesque carving of The Green Man, carved in the middle ages, St. Michael's Church, Garway, Herefordshire, England, UK.

Will Watson / Chancel arch featuring a Green Man carving, carved in the middle ages, St. Michael's Church, Garway, Herefordshire, England, UK.

Will Watson / Representation of Lion's (Panthera leo) head with raised paw representing evil on Eardisley Font, carved in the mid 12th century in the Romanesque style, Herefordshire, England, UK.

Will Watson / Depiction of Christ rescuing fallen Adam with 'Sacred Bird' perched on his shoulder on Eardisley Font, carved in the mid 12th century in the Romanesque style, Herefordshire, England, UK.

Tui De Roy / View of Bartolome Island, near Santiago Island, showing numerous volcanic spatter and tuff cones of varying ages. Galapagos Islands, Ecuador.

Tui De Roy / Two Blue-footed booby (Sula nebouxii) chicks, with age difference of one week that becomes apparent as first hatched chick obtains more food, nestled under parent. Galapagos Islands, Ecuador.

Tui De Roy / Newly hatched Blue-footed booby (Sula nebouxii) chick, with second egg still unhatched and older chick nestled under parent. Galapagos Islands, Ecuador.

Tui De Roy / Newly hatched Blue-footed booby (Sula nebouxii) chicks, showing age difference, acquiring first down at two or three days, nestled under parent. Galapagos Islands, Ecuador.

Tui De Roy / Newly hatched Blue-footed booby (Sula nebouxii) chicks, showing age difference, acquiring first down at two or three days, nestled under parent. Galapagos Islands, Ecuador.

Tui De Roy / Newly hatched Blue-footed booby (Sula nebouxii) chicks, showing age difference, acquiring first down at two or three days, nestled under parent. Galapagos Islands, Ecuador.

Pascal Pittorino / Half blood arab horse, grey mare and bay foal, ages three-weeks feeding on flowers in meadow, Grands Causses regional Natural Park, Lozere, France, May