A man presents a self-made robot that local media reported is able to carry a person, in Heihe, Heilongjiang province, China, April 5, 2017. (Photo by Reuters/China Daily)

Members of the New People's Army (NPA) female guerrillas perform a cultural show during the release of a Philippines army soldier in Sugbongcogon town, Misamis Oriental, southern Philippines, November 20, 2015. NPA spokesperson Allan Juanito warned that they will seize more soldiers to exchange them with the government as "Prisoners of war". (Photo by Froilan Gallardo/Reuters)

A Ukrainian serviceman wearing a new year's hat waves at his comrades while standing beside his tank near Debaltseve, eastern Ukraine, February 8, 2015. (Photo by Gleb Garanich/Reuters)

A cyclist climbs over a tree fallen atop a car after a heavy storm in Amsterdam, the Netherlands, July 25, 2015. One person was killed as the most severe July storm ever recorded in the Netherlands swept across the country on Saturday, delaying flights and disrupting road and rail traffic. Dozens of flights were delayed at Amsterdam's Schiphol Airport and authorities warned travellers not to take to the road as gale-force winds and rain lashed the country, prompting the meteorological service to issue a “Code Red” warning. (Photo by Cris Toala Olivares/Reuters)

Bottlenose dolphins swim over visitors in water tank at the Hakkeijima Sea Paradise aquarium-amusement park complex in Yokohama, southwest of Tokyo, Tuesday, July 21, 2015. Temperatures in Tokyo's metropolitan area neared around 96 degree Fahrenheit, or 35 degree Celsius, on Tuesday. (Photo by Shuji Kajiyama/AP Photo)

An elephant “kisses” a visitor during a show at an elephant training school in Xishuangbanna, Yunnan province, April 18, 2015. Some 16 elephants live at the school and give four 30-minute performances everyday for visitors. (Photo by Wong Campion/Reuters)

2017 Paraguay-Bolivia-Argentina Dakar rally, 39th Dakar Edition, Seventh stage from Oruro to Uyuni, Bolivia on January 9, 2017. Juan Salvatierra of Bolivia rides his KTM. (Photo by Ricardo Moraes/Reuters)

The Blue Man Group performs on stage during a media preview ahead of their show in Singapore on March 31, 2016. Blue Man Group was started by three friends in New York in 1991 as a way to celebrate the human spirit through music, science, art and theater. (Photo by Roslan Rahman/AFP Photo)