Tao Xiangli gets out of his homemade submarine after operating it in a lake on the outskirts of Beijing September 3, 2009. Amateur inventor Tao, 34, made a fully functional submarine, which has a periscope, depth control tanks, electric motors, manometer, and two propellers, from old oil barrels and tools which he bought at a second-hand market. He took 2 years to invent and test the submarine which costs 30,000 yuan ($4,385). (Photo by Christina Hu/Reuters)

Nikolai Tolstyh takes photos of paper animal silhouettes in a natural setting. The combination is surprisingly perfect: the surroundings provide both color for the cutout and a scene to frame the animal.

Socialite Kathy Hilton attends the Prudential Financial Grand Prix Hamptons Classic Horse Show August 31, 2003 in Bridgehampton, New York.

Smithfield meat porters march on the Home Office, bearing a petition which calls for an end to all immigration into Britain, 25th August 1972. (Photo by Keystone/Hulton Archive/Getty Images)

Journeys and adventures winner – This is My Jungle. A wild elephant attacks a jeep full of people. “We should respect nature and care more about it, but we should also avoid taking unnecessary and reckless risks”. (Photo by Savvi Sergey/SIPA Contest)

People wear face masks to protect against the coronavirus as they walk across an intersection in Beijing, Friday, June 5, 2020. China on Friday reported five new confirmed coronavirus cases, all of them brought by Chinese citizens from outside the country. (Photo by Mark Schiefelbein/AP Photo)

Prince Philip, Duke of Edinburgh practicing his bicycle polo technique, Windsor Great Park, Berkshire, 1964. (Photo by Norman Potter/Daily Express/Hulton Archive/Getty Images)

Visitors photograph an animatronic Tyrannosaurus Rex at the National Museum of Scotland, July 29, 2011. (Photo by David Moir/Reuters)