An unkindness of ravens in Juneau, Alaska (© Brian Browitt Photo/Adobe Stock)

Hyacinth macaws in the Pantanal region of Brazil (© David Pattyn/Minden Pictures)

The Ivishak River in the North Slope Borough, Alaska (© Don Paulson/Danita Delimont)

The Roman amphitheater of Itálica near Santiponce, Spain (© Amazing Aerial Agency/Offset by Shutterstock)

Andromeda galaxy (© NASA/JPL-Caltech)

A canopy of trees in a forest in Prince Edward Island (© OliverChilds/Getty Images)

Fall foliage in Mount Assiniboine Provincial Park, British Columbia (© Mitch Pittman/TANDEM Stills + Motion)

Huay Mae Khamin waterfall in Khuean Srinagarindra National Park, Thailand (© Casper1774Studio/Getty Images)

Common octopus in sea grass off the coast of France in the Gulf of Lion in the Mediterranean Sea (© BIOSPHOTO/Alamy)

Sandhill cranes and mallard ducks, Bosque del Apache National Wildlife Refuge, New Mexico (© Cathy & Gordon Illg/Jaynes Gallery/DanitaDelimont.com)

Rainbow abalone shell, New Zealand (© Lynda Harper/Minden Pictures)

Least Chipmunk (Tamias minimus) adult, feeding on berries in Autumn, Jasper National Park, Alta. (© Ignacio Yufera/Minden Pictures)

Saint-Malo in Brittany, France (© Mathieu Rivrin/Moment/Getty Images)

An ichthyosaur fossil of the Jurassic period, Dinosaurland Fossil Museum, Lyme Regis, Dorset, England (© Christopher Jones/Alamy)

Saguaro 'family' and Milky Way, Saguaro National Park, Arizona (© Christian Foto Az/Shutterstock)

Farra di Soligo in the Prosecco Hills of Veneto, Italy (© Olimpio Fantuz/Sime/eStock Photo)

The Wapizagonke Lake in La Mauricie National Park, Quebec (© Instants/Getty Images)

Redwood Memorial Grove in Whakarewarewa Forest, North Island, New Zealand (© Michael Breitung/Huber/eStock Photo)

Capel Curig in Snowdonia National Park, Wales, United Kingdom (© Sebastian Wasek/Sime/eStock Photo)

The Fanal Forest on Madeira Island, Portugal (© Val Thoermer/Alamy)

Brown-throated three-toed sloth in Manuel Antonio National Park, Costa Rica (© Lukas Kovarik/Shutterstock)

Bald cypress and Spanish moss in the Atchafalaya Basin, Louisiana (© Chris Moore/Exploring Light Photography/Tandem Stills + Motion)

Comet NEOWISE streaks across the sky over Sunwapta Lake in Jasper National Park, Alberta (© Stocktrek Images, Inc./Alamy)

Eurasian scops owl in Bohemian Switzerland National Park, Czech Republic (© Milan Zygmunt/Alamy)

Bavljenac Island, Croatia (© Julien Duval/Amazing Aerial Agency)

Dyavolski Most (Devil's Bridge) over the Arda River in Bulgaria (© Petar Mladenov/Alamy)

Red fox in the Black Forest of Germany (© Klaus Echle/Minden Pictures)

A pumpkin patch in Newton, Massachusetts (© Frank Debonis/EyeEm/Alamy)

Cinnamon fern meadow near St. Mary's River, Nova Scotia (© Irwin Barrett/Design Pics/Alamy)

Misty pine forest in the Central Highlands of Vietnam (© Thanh Thuy/Moment/Getty Images)

Grotesques at York Minster, North Yorkshire, England (© John Potter/Alamy)