Symmetrical brain coral on a reef in the Caribbean Sea near Grand Cayman, Cayman Islands (© Alex Mustard/Minden Pictures)

Harp seal sleeping at Jones Beach, Long Island, New York (© Vicki Jauron, Babylon and Beyond Photography/Getty Images)

Skyline of Prague, Czech Republic (© benkrut/Getty Images)

The Lick Observatory on Mount Hamilton, near San Jose, California (© Jeffrey Lewis/Tandem Stills + Motion)

Borrego Badlands in Anza-Borrego Desert State Park, California (© Tom Hogan/plainpicture)

Plate-billed mountain toucan in Bellavista Cloud Forest Reserve, Ecuador (© Tui De Roy/Minden Pictures)

Kochelsee and Heimgarten Mountain in Bavaria, Germany (© Reinhard Schmid/eStock Photo)

Nazaré Lighthouse atop Forte de São Miguel Arcanjo, Nazaré, Portugal (© Richard A Lock/Getty Images)

American bison in Yellowstone National Park, Wyoming (© Steve Gettle/Minden Pictures)

Rice laid out to dry in Dhamrai, Dhaka, Bangladesh (© Amazing Aerial Agency/Offset by Shutterstock)

Ski touring in the High Tauern mountain range near Bad Gastein, Austria (© RooM the Agency/Alamy)

A porcupine hangs on a willow tree branch, Alaska (© Design Pics/Danita Delimont)

Mount Fanjing in southwest China (© zhuxiaophotography/Shutterstock)

Northern lights over a stranded boat in Tasiilaq, Greenland (© Shane P. White/Minden Pictures)

The road leading to Sa Calobra on the Spanish Balearic island of Majorca (© Tolo Balaguer/agefotostock)

To Sua Ocean Trench on the south coast of Upolu Island in Samoa (© Chris McLennan/Alamy)

Sorting chili peppers at a farm in Bogra, Bangladesh (© Amazing Aerial Agency/Offset/Shutterstock)

MLK memorial sculpture by William Tarr outside of Martin Luther King Jr. Educational Campus in New York City (© Randy Duchaine/Alamy)

Ashdown Forest, home of Winnie-the-Pooh, England (© Mark Phillips/Alamy)

Saint Elias Mountains and Kaskawulsh Glacier in Kluane National Park and Reserve, Yukon, Canada (© Design Pics Inc/Alamy)

Adélie penguin in Graham Passage, Antarctic Peninsula, Antarctica (© Nick Garbutt/Minden Pictures)

A lion cub and mother in Sabi Sabi Game Reserve, South Africa (© Andrew Coleman/Getty Images)

Martinique, Lesser Antilles, Caribbean Sea (© Airpano LLC/Amazing Aerial Agency)

Meoto Iwa (Wedded Rocks) off the coast of Futami, Mie Prefecture, Honshu, Japan (© Marco Gaiotti/plainpicture)

Lower Manhattan in New York City (© New York On Air/Offset/Shutterstock)

Tŵr Mawr lighthouse on Llanddwyn Island, Anglesey, Wales (© Joe Daniel Price/Getty Images)

Mehrangarh Fort in Jodhpur, Rajasthan, India (© Jayakumar/Shutterstock)

Bluespotted ribbontail ray near Perth, Australia (© Jeff Rotman/Minden Pictures)

Short-eared owl hunting at dusk in Worlaby Carrs, Lincolnshire, England (© Ben Hall/Minden Pictures)

Halo around the sun in the Ore Mountains, Saxony, Germany (© Martin Ruegner/Getty Images)

Workers sorting incense in the Huyện Ứng Hòa district of Hanoi, Vietnam (© Azim Khan Ronnie/Amazing Aerial Agency)