A cat sits on the empty Great Wall on February 23, 2021 in Beijing, China. Affected by the new coronavirus (COVID-19), the number of visitors to Mutianyu Great Wall in 2020 dropped by about 60%. (Photo by Lintao Zhang/Getty Images)

Kyuta Kumagai, 10, wrestles with a boy the same age as him, during a training session at Buddy acL Ariake's wrestling club in Tokyo, Japan, August 22, 2020. (Photo by Kim Kyung-Hoon/Reuters)

A woman wearing a protective mask walks outside a village that was placed under lockdown due to the number of COVID-19 cases among residents in Manila, Philippines on Thursday, March 11, 2021. The Philippine capital placed two villages and two hotels on lockdown Thursday and police have renewed warnings against kissing and other “public display of affection” after a new surge in coronavirus infections. (Photo by Aaron Favila/AP Photo)

Jerome Holcomb of Birmingham, Ala., posses for a photo atop a longhorn steer at the Fort Worth Stockyards Thursday, March 11, 2021, in Fort Worth, Texas. The mask mandate to prevent the spread of COVID-19 has been cancelled in Texas. Holcomb said he was tired of wearing a face mask so he came to visit Fort Worth after the Alabama governor extended the mask mandate in his home state. (Photo by L.M. Otero/AP Photo)

A Hindu devotee drinks water from the Ganges River at the Sangam area, the confluence of rivers Ganges, Yamuna, and the mythical Saraswati, in Allahabad on March 16, 2021. (Photo by Sanjay Kanojia/AFP Photo)

Flamengo soccer fans cheer a goal scored by Gabriel against Argentina's River Plate in the Copa Libertadores final match, broadcast on a giant screen at a watch party at the Macarena Stadium, in Rio de Janeiro, Brazil, Saturday, November 23, 2019. The first single-match final will be played in front of more than 65,000 fans at Lima’s Monumental Stadium. The match was originally scheduled for Santiago’s National Stadium, but it was moved because of street protests in Chile. (Photo by Silvia Izquierdo/AP Photo)

A large brawl breaks out as people leave the track after Sydney Racing at Rosehill Gardens on December 07, 2019 in Sydney, Australia. (Photo by Mark Evans/Getty Images)

A helicopter drops fire retardent to protect a property in Balmoral, 150 kilometres southwest of Sydney on December 19, 2019. A state of emergency was declared in Australia's most populated region on December 19, as a record heat wave fanned unprecedented bushfires. (Photo by Peter Parks/AFP Photo)