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

[20181016] - '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)

[20181015] - '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)

[20181014] - 'The Bode Museum during the Festival of Lights (© fhm/Getty Images)(Bing United States)'

[20181013] - ''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)

[20181012] - '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)

[20181011] - 'Schoolgirls in Fort Kochi, Kerala, India (© imageBROKER/Alamy)(Bing United States)'

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

[20181010] - 'Hubble Space Telescope’s view of Saturn (© NASA)(Bing United States)'

For Leif Erikson Day, a Norse building at L

[20181009] - '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)'

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