Anak Krakatoa volcano erupting off the coast of Sumatra, Indonesia (© Martin Rietze/Alamy)

Hawaii Volcanoes National Park, Hawaii (© Grant Ordelheide/Tandem Stills + Motion)

Reflections on Crummock Water in the Lake District, Cumbria, England (© Damian Harrison/Alamy)

Swift fox pups in Grasslands National Park near Val Marie in Saskatchewan (© John E Marriott/age fotostock)

Vancouver’s first permanently rainbow coloured crosswalk in downtown Vancouver (© Maxvis/Getty Images)

Weißstörche im Naturpark Los Barruecos, Cáceres, Spanien (© Wild Wonders of Europe/Widstrand/Minden Pictures)

White storks at Los Barruecos Natural Monument, Caceres, Spain (© Wild Wonders of Europe/Widstrand/Minden Pictures)

Male leopard in Linyanti Wildlife Reserve, Botswana (© Karine Aigner/Tandem Stills + Motion)

Male leopard in Linyanti Wildlife Reserve, Botswana (© Karine Aigner/Tandem Stills + Motion)

The Supertree Grove in Singapore's Gardens by the Bay (© John Warburton-Lee/Danita Delimont)

Abstract motion blur of aspen trees in Kluane National Park, Yukon (© Don Paulson/Jaynes Gallery/Danita Delimont)

A thunderstorm rolls across the Theodore Roosevelt National Park in North Dakota (© Judith Zimmerman/Danita Delimont)

Elephants in the Amboseli National Park, Kenya (© Adam Bannister/Offset)

Mars Express image of the icy cap at Mars’ south pole (© ESA/DLR/FU Berlin/Bill Dunford)

Male and female Ecuadorian horned anoles in Mindo, Ecuador (© James Christensen/Minden Pictures)

Smögen, Sweden (© Martin Wahlborg/Getty Images Plus)

Yukon River viewed from the Midnight Dome, Dawson City, Yukon, Canada (© Robert Postma/Getty Images)

Bees for National Honey Bee Day (© Angela Parker/Offset)

Tidal pools of Leça da Palmeira, Portugal (© Fernando Guerra/age fotostock)

Muje-Oulu Lake in eastern Finland (© Topi Ylä-Mononen/plainpicture)

Cave interior at Magdalen Islands, Que. (© Virginie Fréchette/Getty Images)

Wildebeest herd crossing the Mara River between Kenya and Tanzania (© zhengvision/Getty Images)

The Dubai Fountain in Burj Lake taken from the Burj Khalifa in Dubai (© Eli Asenova/Getty Images)

Farmland in Washington state's Palouse region (© Art Wolfe/Getty Images)

Brown bears in Katmai National Park, Alaska (© imageBROKER/SuperStock)

Satellite image of the Burning Man Festival in Black Rock City, Nevada (© DigitalGlobe/ScapeWare3d/Getty Images)

Royal Albert Hall during the annual BBC Proms festival in London (© Oli Scarff/Getty Images)

The Gardens of the Palazzo Corsini al Prato in Florence for the New Generation Festival (© Will Perrett/Alamy)

Blurred view of ride at the Canadian National Exhibition, Toronto (© Tetra Images LLC/Alamy Stock Photo)

Asbury Park in New Jersey (© Patrick Morisson/Alamy)

Slacklining between giant boulders in Bishop, California (© Evgeny Vasenev/Aurora Photos)