Río Negro, Amazon basin, Brazil (© Timothy Allen/Getty Images)

Fallow deer in Bradgate Park, Leicestershire, England (© Chris Bainbridge/Alamy)

Toledo, Spain (© Carlos Fernandez/Getty Images)

Hall of Mosses trail in the Hoh Rain Forest, Olympic National Park, Washington (© James Randklev/Getty Images)

Flint corn (© Cynthia Liang/Shutterstock)

Grand Teton National Park, Wyoming (© Westend61/Getty Images)

Gray seal pup, Norfolk, England (© Vince Burton/Minden Pictures)

Chapman Adventure Playground in the Gathering Place, Tulsa, Oklahoma (© Susan Vineyard/Alamy)

Alam-Pedja Nature Reserve, Estonia (© Sven Zacek/Minden Pictures)

Polar bear mother and cubs, Churchill, Manitoba, Canada (© Thorsten Milse/Getty Images)