Spine-cheeked anemonefish surrounded by bubble-tip anemone, Milne Bay, Papua New Guinea (© Fred Bavendam/Nature Picture Library)

Rainbow River in Rainbow Springs State Park, Florida, United States (© Michel Roggo/Minden Pictures)

Skipper butterfly on an Echinacea flower, Rockefeller State Park, New York (© Marianne A. Campolongo/Alamy)

Descending the Col du Tourmalet in the French Pyrenees during the 2021 Tour de France (© THOMAS SAMSON/AFP via Getty Images)

Mesquite Flat Sand Dunes in Death Valley National Park, California, United States (© Bryan Jolley/TANDEM Stills + Motion)

Northern gannets diving for fish, Shetland Islands, Scotland (© Richard Shucksmith/Minden Pictures)

Seceda, a peak in the Dolomites, South Tyrol, Italy (© Kalyakan/Adobe Stock)

Constitución railway station, Buenos Aires, Argentina (© Grafissimo/Getty Images)

Turquoise waters of the Bahamas (© BlueOrange Studio/Adobe Stock)

Tokyo at sunrise, Japan (© pongnathee kluaythong/Getty Images)

Thomson's gazelle mother and fawn, Maasai Mara, Kenya (© Gallo Images/DanitaDelimont.com)

Basalt columns in Kálfshamarsvík cove, Skagi peninsula, Iceland (© Arterra Picture Library/Alamy)

Young blue shark swimming off the coast of Galicia, Spain (© Damocean/Getty Images)

Perseid meteor shower and an ancient bristlecone pine, Great Basin National Park, Nevada, United States (© Wirestock Creators/Shutterstock)

Temple of Philae (aka Temple of Isis), Aswan, Egypt (© Ratnakorn Piyasirisorost/Getty Images)

Lavender fields in Plateau de Valensole, France (© zpagistock/Getty Images)

Orosei, Sardinia, Italy (© EyeEm Mobile GmbH/Getty Images)

Jackson's Point Lighthouse on Lake Simcoe, Ontario (© AWSeebaran/E+/Getty Images)

The moon's surface seen through a telescope (© Sergey Kuznetsov/Getty Images)

Staghorn coral off the island of Bonaire, Caribbean Netherlands (© blue-sea.cz/Shutterstock)

Sunset over Badlands National Park, South Dakota, United States (© Petr Bednarik/Danita Delimont/Alamy Stock Photo)

Vatican City with Saint Peter's Basilica, Rome, Italy (© RudyBalasko/Getty Images)

Family of ashy woodswallows perched on a branch (© Captain Skyhigh/Getty Images)

Aerial view of colourful houses, Las Palmas de Gran Canaria, Spain (© Marco Bottigelli/Getty Images)

Mangrove trees at twilight, Walakiri Beach, island of Sumba, Indonesia (© Boonchet Ch./Getty Images)

School of blackfin barracuda, Shark Reef, Ras Mohammed National Park, Sinai Peninsula, Egypt (© Alex Mustard/Nature Picture Library)

Yurts in the grassland of Mongolia (© Michel Arnault/Shutterstock)

Female Bengal tiger, Kanha National Park, India (© Axel Gomille/Nature Picture Library)

'Beyond Walls' land-art installation by Saype at Expo 2020 Dubai, United Arab Emirates (© VALENTIN FLAURAUD/EPA-EFE/Shutterstock)

Kalalau Beach on the Nā Pali Coast, Kauai, Hawaii, United States (© Russ Bishop/DanitaDelimont.com)