Young gymnasts practice pull-up on a bar at a gymnasium of a sports school in Jiaxing, Zhejiang province April 11, 2015. (Photo by William Hong/Reuters)

A staff member of a toy store wears a face mask as she invites customers to enter the store, in London, Tuesday, September 22, 2020. British Prime Minister Boris Johnson has slammed the brakes on the country's return to offices, saying people should work from home if possible to help slow the spread of the coronavirus. Johnson on Tuesday announced a package of new restrictions, including a requirement for pubs, restaurants and other hospitality venues in England to close between 10 p.m. and 5 a.m. (Photo by Frank Augstein/AP Photo)

San Diego Ballet School students wear protective masks backstage during a performance of “The Nutcracker”, presented by the San Diego Ballet in a drive-in performance at a parking lot in San Diego, California, December 5, 2020. (Photo by Bing Guan/Reuters)

An Orangutan named Elze walks in the Biopark of Rio during a media tour in Rio de Janeiro, Brazil, Thursday, March 18, 2021. The park was closed to the public for renovations to convert the city zoo into a center for biodiversity conservation and will reopen to the general public at the end of March. (Photo by Bruna Prado/AP Photo)

Tandem hair drying is possible with a new two-hood attachment for any electric hair dryer manufactured by Postcraft Co of Tucson, Ariz., shown in Chicago, January 27, 1965. A Y adapter permits two hoses to be attached to the dryer. (Photo by Edward Kitch/AP Photo)

A Colombia fan clearly regrets invading the pitch as she is chased by a large security guard during the International Friendly match between Australia and Colombia at Craven Cottage on March 27, 2018 in London, England. (Photo by Charlotte Wilson/Offside/Getty Images)

Protesters wear gas masks in the front of the Romanian Environment Ministry in Bucharest March 4, 2019, to demand better air. Dozens of people holding placards reading “Our children don't breath air anymore” gather in the front of the Environment Ministry to ask for better breathable air in Bucharest. (Photo by Daniel Mihailescu/AFP Photo)

Dancers resting on the rooftop of the SKD Theatre Asakusa, Tokyo, 1949. (Photo by Tanuma Takeyoshi/The Guardian)