This photo taken on May 20, 2020 shows elementary school students wearing wings to maintain social distancing amid concerns of the COVID-19 coronavirus, in a classroom in Taiyuan in China's northern Shanxi province. (Photo by AFP Photo/China Stringer Network)

A worker, dressed in a protective suit, cleans Conchitas Beach contaminated by an oil spill, in Ancon, Peru, Thursday, January 20, 2022. The oil spill on the Peruvian coast was caused by the waves from an eruption of an undersea volcano in the South Pacific nation of Tonga. (Photo by Martin Mejia/AP Photo)

Susan Njeri (C), mother of late face mask vendor Boniface Mwangi Kariuki, breaks down at Kenyatta University Funeral Home in Nairobi, Kenya, 11 July 2025. Kariuki was shot by police on 17 June during protests over the death of a Kenyan blogger in police custody. He died two weeks later while receiving treatment. (Photo by Daniel Irungu/EPA)

An Iraqi Muslim woman walks past Christmas decorations for sale in the Shiite holy city of Najaf on December 17, 2015. (Photo by Haidar Hamdani/AFP Photo)

Tsar Alexander II (1818–1881) known as “The Liberator” lying in state. He was mortally wounded by an assassination attack in St Petersburg. (Photo by Hulton Archive/Getty Images). March 1881

Two guards perform an execution in China, one holding the gun, the other holding a mask over the victim's face. (Photo by General Photographic Agency/Getty Images). Circa 1925

Xochimilco – Island of the Dolls – Dead Line. Photo by Ramalama_22

Six-month old female liliger cub Eva plays in snow with her mother Zita in the Zoo in Novosibirsk, Russia, Thursday, December 5, 2013. The cub's mother is Zita, a liger – half-lioness, half-tiger, and its father is a lion, Sam. (Photo by Ilnar Salakhiev/AP Photo)