Black-tailed prairie dogs at Roberts Prairie Dog Town, Badlands National Park, South Dakota (© Greg Vaughn/Getty Images)

Interstellar clouds in the Lagoon Nebula, captured by the Hubble Space Telescope (© ESA/NASA)

Sea stacks of Bandon Beach in Bandon, Oregon (© Grant Ordelheide/TANDEM Stills + Motion)

Polar bear in Churchill, Manitoba, Canada (© karen crewe/Getty Images)

Colorful lanterns at the temple of Wat Phra That Hariphunchai, Lamphun, Thailand (© MR. ANUJAK JAIMOOK/Getty Images)

Peña Roya beech forest, Moncayo Natural Park, Zaragoza, Aragon, Spain (© David Santiago Garcia/DEEPOL by plainpicture)

Tower Bridge, London, England (© Nick Brundle Photography/Getty Images)

Jellyfish swimming in the Pacific, Guerrero, Mexico (© Christian Vizl/TANDEM Stills + Motion)

Colorful maple leaves and bamboo forest in Arashiyama, Kyoto, Japan (© DoctorEgg/Getty Images)

Bison grazing at thermal hot springs, Yellowstone National Park, Wyoming (© Cheryl Ramalho/Getty Images)