Southern cassowary father with chicks, Kuranda, Queensland, Australia (© Martin Willis/Minden Pictures)

Low angle view of Charminar in Hyderabad, India (© Getty Images)

Cycling across a natural rock arch in the desert near Moab, Utah (© Whit Richardson/Cavan)

Spotted deer, Ranthambore National Park, Rajasthan, India (© Ondrej Prosicky/Shutterstock)

Rapa Valley in Sarek National Park, Sweden (© Alena Vishina/Alamy)

An indigo bunting at the John James Audubon Center at Mill Grove in Audubon, Pennsylvania (© Vicki Jauron/Getty Images)

Haaga Rhododendron Park, Helsinki, Finland (© Samuli Vainionpää/Getty Images)

Long-beaked common dolphin pod and diving Cape gannets hunting Pacific sardines off the Eastern Cape, South Africa (© Pete Oxford/Minden Pictures)

Long-beaked common dolphin, Eastern Cape, South Africa (© Pete Oxford/Minden Pictures)

Poppies in bloom, Moravia, Czech Republic (© rusm/Getty Images)

Misool Island, one of the four major islands in the Raja Ampat Islands in West Papua, Indonesia (© Elsy Saldek/Getty Images)

Cliffs of the Sierra Ponce and Rio Grande River, Big Bend National Park, Texas (© Tim Fitzharris/Minden Pictures)

Elephant walking in the Okavango River, Botswana (© Markus Pavlowsky/Getty Images)

Spotted deer, Ranthambore National Park, Rajasthan, India (© Ondrej Prosicky/Shutterstock)

The Metropolitan Museum of Art, New York City, USA (© Susanne Pommer/Shutterstock)

Seungseon Bridge at Seonam Temple in Jogyesan Provincial Park, South Korea (© Aaron Choi/Getty Images)

Balsamroot wildflowers bloom below the Teton Mountains in Grand Teton National Park, Wyoming (© Mike Cavaroc/Tandem Stills + Motion)

Surfers catching waves at Palm Beach on the Gold Coast, Queensland, Australia (© Darren Tierney/Getty Images)

Two Old World swallowtail butterflies on a flower (© Alberto Ghizzi Panizza/Getty Images)

Ganga river, Lakshman Jhula, and Tera Manzil Temple in Rishikesh, India (© Travelwild/Shutterstock)

Yasuní National Park in Amazonian Ecuador (© Paul Bertner/Minden Pictures)