Horsehair parachute fungus, Belarus (© Máté/Nature Picture Library)

Traditional beach huts, Southwold, Suffolk Heritage Coast, England (© stevendocwra/Getty Images)

Coyote Buttes, Vermilion Cliffs National Monument, Arizona (© James Hager/Getty Images)

Westerheversand Lighthouse in Westerhever, Schleswig-Holstein, Germany (© bluejayphoto/Getty Images)

Green-crowned brilliant hummingbirds feeding on lobster-claw flowers, Costa Rica (© Paul Hobson/Nature Picture Library)

Lake Fyans, Grampians National Park, Victoria, Australia (© tracielouise/Getty Images)

'Industries of California' mural by Ralph Stackpole at Coit Tower, San Francisco, California (© David R. Frazier Photolibrary, Inc./Alamy)

Beech tree in a cereal field, East Meon, South Downs National Park, Hampshire, England (© Guy Edwardes/Minden Pictures)

Gabit Keni Beach near Ankola, Karnataka, India (© Amith Nag Photography/Getty Images)

Aerial view of Olvera, Andalusia, Spain (© Marco Bottigelli/Getty Images)

The Flight 93 National Memorial Visitor Center near Shanksville, Pennsylvania (© Maurice Savage/Alamy)

California sea lions hunting a sardine bait ball, offshore Mexico, Pacific Ocean (© Henley Spiers/Nature Picture Library)

Cadini di Misurina, Dolomites, Veneto, Italy (© Vithun Khamsong/Getty Images)

Field of kochia plants, China (© lingqi xie/Getty Images)

Polar bear cubs playing in Svalbard, Norway (© Danny Green/Nature Picture Library)