A polar bear family near the Hudson Bay in Churchill, Manitoba, Canada (© Marco Pozzi Photographer/Getty Images)

Coffee cherries in Quindío, Colombia (© The Colombian Way Ltda/Getty Images)

The Trossachs National Park in autumn, Stirling, Scotland (© Jon Arnold/Danita Delimont)

Adélie penguins at Possession Island, Antarctica (© Tui De Roy/Minden Pictures)

Sequence of enhanced-color images of Jupiter (© Enhanced Image by Gerald Eichstädt and Sean Doran, CC BY-NC-SA, based on images provided Courtesy of NASA/JPL-Caltech/SwRI/MSSS)

Tintern Abbey, Wales (© Lynda Morris Photography/Getty Images)

Aerial view of Marlborough Sounds, New Zealand (© Mathias Ortmann/Getty Images)

Octopus spotted during a night dive near Kona, Hawaii (© Jeff Milisen/Alamy)

Octopus spotted during a night dive near Kona, Hawaii (© Jeff Milisen/Alamy)

Letchworth State Park, New York (© Jay O'Brien/Danita Delimont)

Bubble Nebula (NGC 7635) (© NASA, ESA, and the Hubble Heritage Team STScI/AURA)

Voiliers se rassemblant pour la régate Barcolana dans le Golfe de Trieste, Italie (© Ababsolutum/E+/Getty Images)

Boats massing for the Barcolana regatta in the Gulf of Trieste, Italy (© Ababsolutum/E+/Getty Images)

Highbush blueberry plants in Acadia National Park, Maine (© Danita Delimont/Gallo Images/Getty Images Plus)

Sunrise in Alberta, Canada (© Ambre Haller/Moment/Getty Images)

Highbush blueberry plants in Acadia National Park, Maine, USA (© Danita Delimont/Gallo Images/Getty Images Plus)

A fossilized carboniferous fern (© Juan Carlos Munoz/Minden Pictures)

Autumn leaves and goldfish in Tokyo, Japan (© qrsk/Moment/Getty Images)

Chimney Rock and Uncompahgre National Forest, Colorado (© Cory Marshall/Tandem Stills + Motion)

Paresseux à trois doigts dans un arbre sur Sloth Island, Essequibo, Guyane (© Suzi Eszterhas/Minden Pictures)

Pale-throated sloth perched in a tree on Sloth Island, Essequibo River, Guyana (© Suzi Eszterhas/Minden Pictures)

Ashdown Forest, East Sussex, United Kingdom (© Tim Stocker Photography/Getty Images)

Blackbird eating a crab apple in a garden in Wiltshire, United Kingdom (© Nick Upton/Minden Pictures)

Hancock-Greenfield Bridge (aka County Bridge) in New Hampshire (© Denis Tangney Jr/E+/Getty Images)

Ring-tailed lemurs in Madagascar (© Image Source/Alamy)

Red wattlebird, Victoria, Australia (© plainpicture/Minden Pictures/Jan Wegener/BIA)

Naranjo de Bulnes peak, in Picos de Europa National Park, Asturias, Spain (© Anton Petrus/Getty Images)

Straw-coloured fruit bats in Kasanka National Park, Zambia (© Nick Garbutt/Minden Pictures)

Straw-colored fruit bats in Kasanka National Park, Zambia (© Nick Garbutt/Minden Pictures)

Charles Bridge over the Vltava River in Prague, Czech Republic (© Martin Moxter/Offset)

Pumpkins (© pianisssimo/iStock/Getty Images Plus)