The Parliament of Canada in Ottawa (© anderm/Shutterstock)

A meerkat in Namibia (© Danita Delimont/Offset by Shutterstock)

Wakatobi National Park, Indonesia (© Fabio Lamanna/Alamy)

'Passage migratoire' ('Migratory Passage'), an art installation by Giorgia Volpe in Old Québec City, Québec, Canada (© Lucbouch/Getty Images)

Serra da Malagueta mountains on Santiago Island, Cabo Verde (© Samuel Borges Photography/Shutterstock)

Tawny frogmouth chick, Australia (© SnapRapid/Offset by Shutterstock)

Kazem Dashi rock formation in Lake Urmia, Iran (© Ali/Adobe Stock)

Ortygia, a small island off the coast of Syracuse, Sicily, Italy (© DaLiu/Shutterstock)

A cowboy tends to horses in a barn at the Calgary Stampede on July 10, 2011 in Calgary (© Mario Tama/Getty Images)

Milky Way over the Tagus river in Monfragüe National Park, Spain (© Miguel Angel Muñoz Ruiz/Cavan Images)

Spiral aloe (© David Madison/Getty Images)

Wave crashing on Farolim de Felgueiras, a lighthouse in Porto, Portugal (© Stephan Zirwes/Offset by Shutterstock)

Moose crossing a pond below Mount Moran, Grand Teton National Park, Wyoming (© Jim Stamates/Minden Pictures)

Blacktip reef sharks off the coast of Tahiti, French Polynesia (© Paul Mckenzie/Minden Pictures)

Boats float by rice fields on the Ngo Dong River in Ninh Binh province, Vietnam (© Jeremy Woodhouse/Getty Images)

Mont Choisy Beach, Mauritius (© Robert Harding World Imagery/Offset by Shutterstock)

A Loepa oberthuri moth (© Robert Thompson/Minden Pictures)

Colourful alleyway in the medina of Tétouan, Morocco (© Jan Wlodarczyk/eStock Photo)

Composite image of the moon (© Prathamesh Jaju)

The Vermilion Lakes in Banff National Park, Alberta (© Glowing Earth Photography/Getty Images)

The Minokake-Iwa rocks off the coast of the Izu Peninsula, Japan (© Krzysztof Baranowski/Getty Images)

Tokyo Tower in Minato City, Tokyo, Japan (© Yukinori Hasumi/Getty Images)

Javan tree frogs sitting together on a stalk in Indonesia (© SnapRapid/Offset by Shutterstock)

'Field of Light' by artist Bruce Munro at Uluru, Australia (© Sheralee Stoll/Alamy)

Mangrove trees, Walakiri Beach, Sumba Island, Indonesia (© Tengguo Wu/Getty Images)

Rows of different lavender plants in a field in the Cowichan Valley in British Columbia (© plainpicture/Design Pics/Debra Brash)

School of sea goldies in a coral reef with feather stars, Great Barrier Reef, Queensland, Australia (© Gary Bell/Minden Pictures)

Tiger camouflaged amongst tall grass, Assam, India (© Sandesh Kadur/Minden Pictures)

Aerial view of Nahanni National Park Reserve, Northwest Territories, Canada (© Robert Postma/Getty Images)

Northern carmine and European bee-eaters in Mkomazi National Park, Tanzania (© webguzs/Getty Images)