“A Mothers Tail”. A baby cub pulls on his mother's tail to get attention. Photo location: Masai Mara, Kenya. (Photo and caption by Tori Marsh/National Geographic Photo Contest)

These are the stomach-churning pictures of the swing at the end of the world – a rickety wooden swing hanging over a precipice 2,660 metres above sea level – and not a seatbelt in sight. (Photo by Caters News)

Two Tibetan women wearing traditional striped aprons, elaborate headdresses and abundant jewellery. Original Publication: From a photograph by Shephard. (Photo by Hulton Archive/Getty Images). Circa 1910

Over 30 Douglas C-47 Skytrains (Dakotas) making final preparations for flight formation practice before the 75th D-Day Anniversary flight to Normandy in Duxford, England on June 4, 2019. (Photo by UK Air Force Images)

Migrants, part of a caravan traveling en route to the United States, carry an anteater that was hit by a car, according to them, as they walk on the road that links Arriaga and Tapanatepec, near Arriaga, Mexico, November 5, 2018. (Photo by Carlos Garcia Rawlins/Reuters)

A plane battling the Ferguson Fire passes the setting sun in unincorporated Mariposa County Calif., near Yosemite National Park on Sunday, July 15, 2018. (Photo by Noah Berger/AP Photo)

Donald Trump is flanked by Playmates at a party celebrating Playboy magazine's 45th anniversary at the Life Club in New York on December 3, 1998. (Photo by Richard Corkery/NY Daily News Archive via Getty Images)

A woman wearing a scarf to cover her face looks on as she waits for a passenger bus on a smoggy morning in New Delhi, India, November 8, 2017. The Great Smog of Delhi is an ongoing severe air-pollution event in New Delhi and adjoining areas in the National Capital Territory of India, in November 2017. Air pollution at this time peaked on both PM 2.5 and PM 10 levels. It has been reported as one of the worst levels of air quality in Delhi since 1999. (Photo by Saumya Khandelwal/Reuters)