River in the Croesor Valley, Snowdonia National Park, Gwynedd. (© Matthew Williams-Ellis/Plainpicture)

Great tit and yellow crocuses (© Nataba/Getty Images)

Cherry blossoms at Tai Lake at Wuxi, China (© Eric Yang/Getty Images)

The Kjeragbolten boulder on Kjeragin Rogaland, Norway (© Angel FAyE/Getty Images)

Spring morning in South Downs National Park, East Sussex (© Slawek Staszczuk/Alamy Stock Photo)

Crested caracara birds courting in Texas, USA (© Alan Murphy/Minden Pictures)

Old town of Málaga, Spain (© Sean Pavone Photo/Getty Images)

Coast near Ponta Delgada, Madeira, Portugal (© Jan Wlodarczyk/Alamy)

Arvada Skatepark, Arvada, Colorado, USA (© Jon Paciaroni/Getty Images)

Caracal cubs (© Marion Vollborn/Minden Pictures)

Fiddlehead fern fronds in Quebec, Canada (© Marianna Armata/Getty Images)

ISSからの月 (© NASA)

Mitsumata (aka paperbush) in a forest in Japan (© nattya3714/Getty Images)

L'Arc de Triomphe, Wrapped, a posthumous art installation by Christo and Jeanne-Claude, September 2021, Paris, France (© Bruno de HOGUES/Getty Images)

Aerial view of Grand Prismatic Spring, Yellowstone National Park, Wyoming, USA (© AirPano LLC/Amazing Aerial Agency)

The blue eggs of an American robin in New Jersey, USA (© Mira/Alamy)

The blue eggs of an American robin in New Jersey (© Mira/Alamy)

Square Tower House, Mesa Verde National Park, Colorado, USA (© lightphoto/Getty Images)

Horseshoe Bend, Arizona, USA (© Michael Dunn/Getty Images)

Mute swan chicks, Massapequa Preserve, Long Island, New York, USA (© Vicki Jauron/Getty Images)

Small lake in Karula National Park, Valgamaa County, Estonia (© Sven Zacek/Minden Pictures)

Small lake in Karula National Park, Valgamaa County, Estonia (© Sven Zacek/Minden Pictures)

The Great Ridge, Peak District National Park, Castleton, Derbyshire. (© John Finney Photography/Getty Images)

Milky Way, Yosemite National Park, California, USA (© Cory Marshall/Tandem Stills + Motion)

Whangarei Falls, Whangarei Scenic Reserve on North Island, New Zealand (© Nathan Kavumbura/Getty Images)

Midnight sun in Svalbard, Norway (© Nature Picture Library/Alamy)

Dawn light on Eilean Na Mòine island, Loch Eilt, Scotland (© Lilly Husbands/Offset)

A young giant sequoia sprouting out of an old log in Prairie Creek Redwoods State Park, California, USA (© Hutch Axilrod/Getty Images)

Young giant sequoia, Prairie Creek Redwoods State Park, California, USA (© Hutch Axilrod/Getty Images)

Fox kits practise their hunting skills, Quebec, Canada (© Vlad Kamenski/Shutterstock)