A staff member demonstrates how she puts on the helmet of a mock space suit at the C-Space Project Mars simulation base in the Gobi Desert outside Jinchang, Gansu Province, China, April 17, 2019. The facility – comprising several interconnected modules including a greenhouse and a mock decompression chamber – opened its doors to the public. (Photo by Thomas Peter/Reuters)

A Sotheby's employee poses with a claw-set diamond ring weighing 36.57 carats during a press preview of an upcoming auction from Sotheby's in Geneva, Switzerland, 08 May 2019. The ring is expected to reach between 4,500,000 to 5,500,000 US Dollars during the “Magnificent Jewels and Noble Jewels” auction on May 14 in Geneva. (Photo by Valentin Flauraud/EPA/EFE)

Children play on top of an abandoned car at the “Aguerridos Liberator” shanty town in Caracas, Venezuela, Thursday, May 9, 2019. (Photo by Rodrigo Abd/AP Photo)

In this Thursday, November 1, 2018, photo, a girl uses a hammer to crack open shells for edible seeds to sell as snacks in Yangon, Myanmar. A United Nations report says some 486 million people are malnourished in Asia and the Pacific, and progress in alleviating hunger is stalling. (Photo by Thein Zaw/AP Photo)

Pittsburgh police officers stand near a Port Authority bus that had fallen into a sinkhole along 10th Street and Penn Avenue in Pittsburgh on Monday, October 28, 2019. The bus and a car fell in the sinkhole shortly before 8 a.m. One person was taken to the hospital for a minor injury. (Photo by Kristina Serafini/Pittsburgh Tribune-Review via AP Photo)

Fisherman Jose Miguel Perez, whose nickname is “Taliban”, navigates the oil infested waters of Lake Maracaibo, near Cabimas, Venezuela, May 21, 2019. Nobody lives as closely with the environmental fallout of Venezuela's collapsing oil industry as the fishermen who scratch out an existence on the blackened, sticky shores of Lake Maracaibo. (Photo by Rodrigo Abd/AP Photo)

British troops covered in flames from a petrol bomb thrown during a violent protest by job seekers, who say they were promised employment in the security services, in the southern Iraq city of Basra, March 22, 2004. (Photo by Atef Hassan/Reuters)

Competitors bear more than their bikinis during a spring break bikini contest at Summers' in Fort Lauderdale, Florida, USA circa 1985. (Photo by Nik Wheeler/Corbis via Getty Images)