Gavin Hellier / Elevated night view of the Petronas Twin Towers, illuminated at night, Kuala Lumpur, Malaysia, 2012. No release available.

Niall Benvie / Twin Birch (Betula) trees highlighted snow. Senja, Norway, February.

Suzi Eszterhas / Mountain Gorilla (Gorilla gorilla beringei) mother holding five month old twin babies, Parc National des Volcans, Rwanda

Suzi Eszterhas / Mountain Gorilla (Gorilla gorilla beringei) mother holding five month old twin babies, Parc National des Volcans, Rwanda

Mark Hamblin / 2020VISION / Twinflower (Linnaea borealis) in flower in pine woodland, Abernethy National Nature Reserve, Cairngorms National Pasrk, Scotland, UK

Juergen Freund / Itbog Twin Falls, 60ft high, Lake Buhi, Camarines Sur, Luzon, Philippines 2008

Nick Gordon / Silky marmoset, male carrying twin babies (Callithrix humeralifer chrysoleuca) Amazonia, Brazil

TJ Rich / Twin Sisters, Ascension Island

Matthias Breiter / Grizzly Bear (Ursus arctos horribilis) adult female nursing her two yearling cubs on sedge flats, Katmai National Park, Alaska

Katherine Feng / Giant Panda (Ailuropoda melanoleuca) Gongzhu is successfully re-introduced to one of her nine week old twin cubs which she initially rejected, China Conservation and Research Center for the Giant Pand...

Tui De Roy / Chinstrap Penguin (Pygoscelis antarctica) bowing over twin chicks Nelson Island, South Shetland Islands, Antarctica

Anup Shah / Female Chimpanzee 'Gremlin' 31-years-old, carrying twin daughters Golden and Glitter, 3-years-3-monhts-old, jockey riding {Pan troglodytes schweinfurtheii} Gombe NP, Tanzania. 2002