Icebergs in Mendenhall Lake near Juneau, Alaska (© John Hyde/age fotostock)(Bing United States)

Icebergs in Mendenhall Lake near Juneau, Alaska (© John Hyde/age fotostock)(Bing United States)

Dinosaur tracks from the Jurassic Period found near Tuba City, Arizona, in the Navajo Nation (© wanderluster/Getty Images)(Bing United States)

Dinosaur tracks from the Jurassic Period found near Tuba City, Arizona, in the Navajo Nation (© wanderluster/Getty Images)(Bing United States)

An oxpecker sits on an African buffalo in Maasai Mara National Reserve, Kenya (© Susan Portnoy/Offset)(Bing United States)

An oxpecker sits on an African buffalo in Maasai Mara National Reserve, Kenya (© Susan Portnoy/Offset)(Bing United States)

Dawn redwoods in a lake at Zimaling Park, Zhongshan, China (© Yaorusheng/Getty Images)(Bing United States)

Dawn redwoods in a lake at Zimaling Park, Zhongshan, China (© Yaorusheng/Getty Images)(Bing United States)

The Bode Museum during the Festival of Lights (© fhm/Getty Images)(Bing United States)

The Bode Museum during the Festival of Lights (© fhm/Getty Images)(Bing United States)

'0 Degrees,' laser art by Peter Fink and Anne Bean, in Greenwich, England (© Norah Saudan/Getty)(Bing United States)

'0 Degrees,' laser art by Peter Fink and Anne Bean, in Greenwich, England (© Norah Saudan/Getty)(Bing United States)

Replica of Lascaux cave paintings at the International Centre for Cave Art in Montignac, France (© Caroline Blumberg/Epa/Shutterstock)(Bing United States)

Replica of Lascaux cave paintings at the International Centre for Cave Art in Montignac, France (© Caroline Blumberg/Epa/Shutterstock)(Bing United States)

Schoolgirls in Fort Kochi, Kerala, India (© imageBROKER/Alamy)(Bing United States)

Schoolgirls in Fort Kochi, Kerala, India (© imageBROKER/Alamy)(Bing United States)

Hubble Space Telescope’s view of Saturn (© NASA)(Bing United States)

Hubble Space Telescope’s view of Saturn (© NASA)(Bing United States)

For Leif Erikson Day, a Norse building at L'Anse aux Meadows National Historic Site in Newfoundland, Canada (© Yves Marcoux/Getty Images)(Bing United States)

For Leif Erikson Day, a Norse building at L'Anse aux Meadows National Historic Site in Newfoundland, Canada (© Yves Marcoux/Getty Images)(Bing United States)

The Albuquerque International Balloon Fiesta runs until October 14 (© Blaine Harrington III/Alamy)(Bing United States)

The Albuquerque International Balloon Fiesta runs until October 14 (© Blaine Harrington III/Alamy)(Bing United States)

Performers at the 26th Human Tower Competition in Tarragona, Spain (© Xinhua/Pau Barrena/Getty Images)(Bing United States)

Performers at the 26th Human Tower Competition in Tarragona, Spain (© Xinhua/Pau Barrena/Getty Images)(Bing United States)

Apple tree on Salt Spring Island in British Columbia, Canada (© Radius Images/Offset)(Bing United States)

Apple tree on Salt Spring Island in British Columbia, Canada (© Radius Images/Offset)(Bing United States)

For Smile Day, a common octopus (© blickwinkel/Alamy)(Bing United States)

For Smile Day, a common octopus (© blickwinkel/Alamy)(Bing United States)

Close-up of a storm on Jupiter from the Juno space probe (© NASA/JPL-Caltech/SwRI/MSSS/Gerald Eichstadt/Sean Doran)(Bing United States)

Close-up of a storm on Jupiter from the Juno space probe (© NASA/JPL-Caltech/SwRI/MSSS/Gerald Eichstadt/Sean Doran)(Bing United States)

Monarch butterflies in Michoacán, Mexico (© Alejandro Prieto/Minden Pictures)(Bing United States)

Monarch butterflies in Michoacán, Mexico (© Alejandro Prieto/Minden Pictures)(Bing United States)

Ouzel Lake in North Cascades National Park, Washington state (© Ethan Welty)(Bing United States)

Ouzel Lake in North Cascades National Park, Washington state (© Ethan Welty)(Bing United States)

Contrails from a 2007 Atlantis shuttle liftoff at the Kennedy Space Center in Florida (© TIM SLOAN/AFP/Getty Images)(Bing United States)

Contrails from a 2007 Atlantis shuttle liftoff at the Kennedy Space Center in Florida (© TIM SLOAN/AFP/Getty Images)(Bing United States)