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

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

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

Colin Seddon / Limousin cross cattle feeding on silage in winter{Bos taurus} Scotland, UK

Colin Seddon / Charolais cross calf bottle feeding {Bos taurus} Scotland,

Staffan Widstrand / Skidoo cross, person on skidoo off the ground, Saami Easter, Kautokeino, Norway

Tony Evans / Avocado fruit growing shoots, leaves and roots {Persea americana}

Yva Momatiuk & John Eastcott / Blue Wildebeest (Connochaetes taurinus) herd trying to cross Mara River, fleeing from hungry Crocodiles, Masai Mara National Reserve, Kenya

Staffan Widstrand / Polar bear and cub cross crack in ice {Ursus maritimus} Churchill, Canada

Tim Fitzharris / Red Fox (Vulpes vulpes) pair in snow fall showing the black and red markings of their cross phase, Montana

Pete Cairns / Electricity pylons cross snowy landscape, Central highlands, Scotland, UK

Colin Seddon / Persian kitten (golden cross) 6 week-old, Scotland, UK

Martin Dohrn / The Southern Cross star constellation shining above Ballenites trees in Masai Mara, Kenya. Starlight image intensifier camera image taken with no artificial light.

Jorma Luhta / Cross country skier and aurora borealis colours in night sky, northern Finland, winter

Gavin Hellier / Elevated view over the harbour and old town, Mykonos (Hora), Cyclades Islands, Greece, 2010

Gavin Hellier / Priest in Bet Danaghel Church holding the Cross of King Lalibela. The rock-hewn churches of Lalibela make it one of the greatest Religio-Historical sites not only in Africa but in the Christian World...

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

Gavin Hellier / Portrait of local Priest holding a traditional Ethiopian cross, Debre Berhan Selassie Church, 'Trinity of the Mount of Light', UNESCO World Heritage Site, Gonder, Ethiopia, 2005

Gavin Hellier / Cross detail on traditional church, Mykonos (Hora), Cyclades Islands, Greece, 2010

Gavin Hellier / Looking out across Santorini island at dusk, Santorini (Thira), Cyclades Islands, Aegean Sea, Greece, 2010

Gavin Hellier / Priest in Bet Danaghel Church holding the Cross of King Lalibela. The rock-hewn churches of Lalibela make it one of the greatest Religio-Historical sites not only in Africa but in the Christian World...

Gavin Hellier / White cliffs of Dover viewed from cross channel ferry, Kent, UK 2009

Andrew Cooper / Black Hereford cross cattle (Bos taurus). Hound Tor, Dartmoor National Park, UK, August.

Alex Hyde / Sheep (Ovis aries) unable to cross cattle grid. Staffordshire, Peak District National Park, UK.

Juan Manuel Borrero / Illustrations of pork tape worm (Taenia solium) with segmented body on the left, cross section of proglottid or body segment on the bottom middle and on the left illustrations of scolex or head. Penci...

Juan Manuel Borrero / Illustration of prokaryotic (left) and eukaryotic (right) cells. Pencil and watercolor painting.

Pascal Tordeux / The graves of American soldiers who died in World War 1, in June and July 1918, Bois Belleau, France, September 2012

Mark Taylor / Embden cross Greylag Gosling and Mallard Duckling.

Mark Taylor / Bichon Frisé x Yorkshire Terrier pups, 6 weeks old.

Mark Taylor / Black-and-white Border Collie x Cocker Spaniel puppy, 11 weeks old, asleep on a cream teddy bear.

Mark Taylor / Maltese cross Shih-tzu pup, Leo, 13 weeks old, sitting.

Mark Taylor / Chug (Pug x Chihuahua) bitch in play-bow.

Mark Taylor / Yorkie mother, Evie, and Poodle father, Raggie, with Yorkipoo puppies, 6 weeks old.