Bison in Wind Cave National Park, South Dakota (© Charlie Summers/Minden Pictures)

Breckenridge, Colorado (© Sean Pavone/Shutterstock)

Wool and mohair yarn (© Jurate Buiviene/Alamy)

Black Fell, Lake District, England (© Daniel Kay/Shutterstock)

Harbin International Ice and Snow Sculpture Festival, Harbin, China (© STR/AFP via Getty Images)

Earth as seen from the International Space Station (© JSC/NASA)

Sandhill cranes, Bosque del Apache National Wildlife Refuge, New Mexico (© Jay Goodrich/Tandem Stills + Motion)

Hohenzollern Castle, Germany (© Sahara Prince/Shutterstock)

Polar bear in Svalbard, Norway (© Dennis Stogsdill/Getty Images)

New Year’s Eve fireworks, Sydney Harbour Bridge, Australia (© Wendell Teodoro/Getty Images)