Steve Downer / Garden cross spider (Aranea diadematus) juvenile spiderling making web, UK.

Ingo Arndt / Cape fur seals (Arctocephalus pusillus) at colony, Cape Cross, Namibia, December

Pal Hermansen / Garden cross spider (Araneus diadematus) on web, Norway.

Mark Taylor / Black and white Jack-a-poo, Jack Russell cross Poodle, pup, 8 weeks old, jumping up.

Mark Taylor / Cockapoo, Cocker spaniel cross Poodle puppy sitting.

Mark Taylor / Cockapoo, Cocker spaniel cross Poodle puppy on hind legs.

Mark Taylor / Tabby-and-white Siberian-cross mother cat carrying her tabby kitten, 4 weeks.

Juan Carlos Munoz / People exploring underground lakes via rigid inflatable boat, Cross Cave (Krizna jama) under Cross Mountain, Green Karst, Slovenia, October 2014.

Sven Zacek / Cross-country skiier on a moonlit night admiring the Northern Lights (Aurora borealis), Norway, March 2013.

Pal Hermansen / Graveyard with white crosses half buried in snow, Svalbard, Norway. March.

Cyril Ruoso / Pygmy kingfisher (Ceyx picta) portrait, Cross River State, Nigeria. Non-ex

Ole Jorgen Liodden / Boy on skis going up slope, framed by snow laden tree, Norway, February 2014.

Markus Varesvuo / Jack snipe (Lymnocryptes minimus), Uto, Finland, November.

Jane Burton / Blue and white Burmese-cross kitten rubbing against sooty-fawn dwarf Rex rabbit.

Jane Burton / Cocker spaniel x poodle (Cockapoo) cross puppies resting with parents.

Jane Burton / Pug x Shih-tzu (Pugzu) cross puppies with parents.

Jane Burton / Sheltie and Dachshund dogs with their puppies.

Bence Mate / Long eared owl (Asio otus) chicks perched on a cross, with the moon, in the background, Puszatszer, Hungary, June.

Robin Chittenden / Boy looking at Green-veined White butterfly (Pieris napi) on his hand, Dorset, UK, May 2013, Model released.

Mark Taylor / Cute chocolate Toy Goldendoodle puppy in play-bow.

Mark Taylor / Black Maine Coon kitten and cute Doxiedoodle puppy.

John Cancalosi / Cross-Section of Utah Septarian Nodule, Utah. A type of geode, Utah Septarian Nodules are found about 15 miles east of Zion National park. They were formed in an ancient sea floor during the Cretaceou...

Jouan Rius / Petrified wood segment, Blue Mesa Badlands, Petrified Forest National Park, Arizona, USA, December 2012.

Laurent Geslin / Urban Red fox in church graveyard {Vulpes vulpes} London, UK

Cyril Ruoso / Chimpanzee (Pan troglodytes) baby playing with keeper, Pandrillus Drill Sanctuary, Nigeria

Cyril Ruoso / Chimpanzee (Pan troglodytes) adults and young, Pandrillus Drill Sanctuary, Nigeria

Cyril Ruoso / Drill (Mandrillus leucophaeus) alpha male calling, Pandrillus Drill Sanctuary, Cross River State, Nigeria

Cyril Ruoso / Drill (Mandrillus leucophaeus) adult male, Pandrillus Drill Sanctuary, Nigeria

Cyril Ruoso / Drill (Mandrillus leucophaeus) adult female grooming alpha male, Pandrillus Drill Sanctuary, Nigeria

Cyril Ruoso / Drill (Mandrillus leucophaeus) adult male close-up of face, Pandrillus Drill Sanctuary, Nigeria

Cyril Ruoso / Drill (Mandrillus leucophaeus) adult male appeasement face, Pandrillus Drill Sanctuary, Nigeria

Florian Möllers / 'Jogi', a Jack Russell Terrier cross breed, male playing in the snow. Germany

Gavin Hellier / Church Priest holding a Lalibela Cross, Lalibela and its rock-hewn Churches rank among the greatest religio-historical sites not only in Africa, but in the Christian world, Lalibela, Ethiopia 2005. Mo...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) juvenile female 'Bokata' aged 6 years walking bi-pedally to cross a river, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Repu...

Anup Shah / Western lowland gorilla (Gorilla gorilla gorilla) juvenile female 'Bokata' aged 6 years walking bi-pedally to cross a river, Bai Hokou, Dzanga Sangha Special Dense Forest Reserve, Central African Repu...

Guy Edwardes / 2020VISION / View over New Forest heathland Ling (Calluna vulgaris) and Bell Heather (Erica cinerea). Fritham Cross, New Forest National Park, Hampshire, England, UK, August.

Guy Edwardes / 2020VISION / View over New Forest heathland with Oak (Quercus robur) tree. Fritham Cross, New Forest National Park, Hampshire, England, UK, August. Did you know? The New Forest has the most extensive area of heath...

Guy Edwardes / 2020VISION / View over New Forest flood pool at Fritham Cross at dawn, New Forest National Park, Hampshire, England, UK, August.

Guy Edwardes / 2020VISION / View over New Forest heathland with Ling (Calluna vulgaris), Bell Heather (Erica cinerea) and pool. Fritham Cross, New Forest National Park, Hampshire, England, UK, August.

Guy Edwardes / 2020VISION / View over New Forest heathland with Ling (Calluna vulgaris) and Bell Heather (Erica cinerea). Fritham Cross at dawn, New Forest National Park, Hampshire, England, UK, August.

Petra Wegner / Mixed breed, white, long haired Cockerpoo / Cockapoo dog, standing on back legs, looking up. Poodle Cocker spaniel cross

Petra Wegner / Mixed breed, white, long haired Cockerpoo / Cockapoo dog, head portrait. Poodle Cocker spaniel cross,

Sven Zacek / People in a cross-country skiing competition. Tartu, Estonia, Europe, February.

Terry Whittaker / 2020VISION / Red deer (Cervus elaphus) about to cross busy road, Richmond Park, London, UK, September

Terry Whittaker / 2020VISION / Red deer (Cervus elaphus) about to cross busy road, Richmond Park, London, UK, September. Did you know? Richmond Park is famous for its red deer, but it also has a thriving population of fallow deer.

Guy Edwardes / 2020VISION / Bog Asphodel (Narthecium ossifragum) and Cross-leaved Heath (Erica tetralix) in flower, New Forest, Hampshire, England, UK, July

Piotr Naskrecki / Cross Frog (Oreophryne sp) male protecting his clutch of eggs, Papua New Guinea

Piotr Naskrecki / Cross Frog (Oreophryne sp) male from a newly discovered species protecting his clutch of eggs, Papua New Guinea

Piotr Naskrecki / Cross Frog (Oreophryne sp), newly discovered species, eggs, Papua New Guinea

John Cancalosi / Staurolite (iron aluminum silicate hydroxide), always crystallized often with two indivuals intergrown at right angles forming a cross. Sometimes used as amulets or ornaments. A fairly common metamorh...

Mark Taylor / Yorkshire Terrier, with Netherland-cross rabbit.

Mark Taylor / Birman-cross kitten playfully rolling.

Mark Taylor / Portrait of a Birman-cross cat.

Mark Taylor / Red toy Poodle dog, and Ragdoll-cross kitten, 5 weeks.

Juergen Freund / Researcher Guido Westhoff looking at a cross section of pit organ tissue from a Coastal carpet python (Morelia spilota mcdowelli) through an electron microscope with 20,000 x magnification. Pit organs...

Jane Burton / A pair of Siamese-cross kittens.

Anup Shah / Thomson's gazelles (Eudorcas thomsonii) following a herd of Wildebeest (Connochaetes taurinus) as they cross the Mara River, wide angle perspective, Masai Mara National Reserve, Kenya. September

Adrian Davies / Polished section through Olive tree trunk (Olea europaea), showing growth rings.

Solvin Zankl / Portrait of a Bouvier des Flander cross-breed dog, sitting and panting

Anup Shah / Eastern white-bearded wildebeest herd (Connochaetes taurinus) waiting to cross the Mara River. Masai Mara National Reserve, Kenya, October 2009

Anup Shah / Eastern white-bearded wildebeest herd (Connochaetes taurinus) preparing to cross the Mara River. Masai Mara National Reserve, Kenya, October 2009

Mark Taylor / Fallow Deer (Dama dama) portrait of fawn standing over a Sandy Netherland-cross rabbit.

Jack Dykinga / Eroded formation known as the 'Tres Maries', in the Valle de la Luna. One million year old composition of gravel, clay, salt, gems and quartz, against The Milky Way and Southern Cross in the night sky...

Jack Dykinga / Eroded rock formation known as the 'Tres Maries', in the Valle de la Luna. One million year old composition of gravel, clay, salt, gems and quartz, against The Milky Way and Southern Cross in the nigh...

Tim Laman / Paradise tree snake (Chrysopelea paradisi) on tree branch preparing to leap into the air to cross between trees, Borneo

Tim Laman / Paradise tree snake (Chrysopelea paradisi) on tree branch preparing to leap into the air to cross between trees, Gunung Palung National Park, Borneo, West Kalimantan, Indonesia.

Neil Lucas / Weddell seal (Leptonychotes weddellii) male surfacing in ice hole, McMurdo Sound, Ross Sea, Antarctica, November 2008

Stephen Dalton / Earthworm (Lumbricus terrestris) in burrow, exposed in sectioned topsoil, England, UK

Uri Golman / Photographer Uri Golman on cross country skies in snow blizzard, Scoresbysund, North East Greenland, March 2009. Model released

Inaki Relanzon / Young Buddhist monks sitting cross legged in a lesson, buddhist monastery, Inle Lake, Shan State, Myanmar, Burma. August 2009

Inaki Relanzon / Young Buddhist monk sitting cross legged and writing in a notebook, buddhist monastery, Inle Lake, Shan State, Myanmar, Burma. August 2009

Andy Rouse / Common wildebeest (Connochaetes taurinus) gathering to cross river on migration, Masai Mara, Kenya

Andy Rouse / Common wildebeest (Connochaetes taurinus) about to cross river during migration, Masai Mara, Kenya

Mark Taylor / Lionhead-cross rabbit sitting up on its haunches

Mark Taylor / Black Terrier-cross puppy, Maisy, 3 months, portrait

Mark Taylor / Border Collie-cross bitch, Bliss, snarling, looking aggressive.

Mark Taylor / White-and-merle Border Collie-cross puppy, Ice, 14 weeks, wearing a Father Christmas hat.

Mark Taylor / Two Miniature Goldendoodle puppies (Golden retriever x Miniature poodle cross), 7 weeks, one lying across the other

Mark Taylor / Sandy Lionhead-cross rabbit.

Mark Taylor / Lionhead-cross rabbit.

Jerry Monkman / A man cross country skiing along the coast at Odiorne Point State Park in Rye, New Hampshire, USA. Model Released. winter 2007

Ross Hoddinott / Moorland view of Nun's Cross Farm, dry stone wall and gate, Dartmoor, Devon, UK. February 2009.

Ross Hoddinott / River with the "Windy Post" in the background, near Feather tor, Dartmoor, Devon, UK. February 2009.

Carol Walker / Bay Azteca stallion (Andalusian and Quarter Horse cross) running onto beach from waves, Summerland Beach, Ojai, California, USA

Carol Walker / Bay Azteca stallion (Andalusian and Quarter Horse cross) trotting onto beach from waves, Summerland Beach, Ojai, California, USA

Robert Valentic / Following the desert rains a Holy cross frog {Notaden benneti} comes to the surface after a long period underground, Nyngan, New South Wales, Australia

Ross Hoddinott / Widgery's Cross on Brat tor, Dartmoor NP, Devon, UK.

Tim Fitzharris / Vervain (Verbena officinalis) at Franklin Mountains State Park, Chihuahuan Desert, Texas

Jack Dykinga / Petrified sand dunes with eroded cross hatch sandstone strata at dawn, Paria Canyon-Vermilion Cliffs Wilderness, Arizona, USA with first winter snow and Juniper bushes {Juniperus osteosperma}

Jane Burton / Domestic Cat {Felis catus} 9-week, Persian-cross, Lilac bicolour and blue cream kittens.

Jane Burton / Domestic cat, 6-month chocolate Persian cross female 'Chloe'

Jane Burton / Looking down on Domestic Cat {Felis catus} 7-week Tabby and white persian-cross kitten looking up

Anup Shah / Black backed jackal (Canis mesomelas) feeds on Cape Fur Seal pup (Arctocephalus pusillus) in colony at Cape Cross Seal Reserve, Namibia

Anup Shah / Cape Fur Seal pup (Arctocephalus pusillus pusillus) fends off Black backed jackal (Canis mesomelas) Cape Cross Seal Reserve, Namibia

Anup Shah / Fur Seal pair mating (Arctocephalus pusillus pusillus) Cape Cross Seal Reserve, Namibia