Pigeon fancier Yonisbel Santana poses for a photo at his rooftop in Havana, Cuba, May 18, 2021. Havana's pigeon keepers crane out of a window, intently watching the grey birds take flight. Mostly staying indoors due to the country's worst outbreak of COVID-19 since the coronavirus pandemic began in March last year, Cubans are increasingly breeding pigeons as a form of escape. (Photo by Alexandre Meneghini/Reuters)

A brown bear cub by the Khailyulya River in north-east Kamchatka, Russia on July 24, 2021. (Photo by Yuri Smityuk/TASS)

A giant panda named Kai Kai looks on as he opens a gift to celebrate his upcoming 14th birthday at the River Safari wildlife park in Singapore on September 10, 2021. (Photo by Roslan Rahman/AFP Photo)

Miley Cyrus performs onstage during the 2021 Music Midtown festival at Piedmont Park on September 19, 2021 in Atlanta, Georgia. (Photo by Paras Griffin/Getty Images for MC)

Nefertara, a supporter of pop star Britney Spears, wears an outfit inspired by the singer as she holds a picture of Britney that she painted, during a gathering on the day of a conservatorship case hearing at Stanley Mosk Courthouse in Los Angeles, California, U.S., September 29, 2021. (Photo by Mario Anzuoni/Reuters)

A picture taken on August 25, 2021 shows a view of the Aletsch Glacier. After hiking for hours across the mountain and a vast expanse of white, Swiss glaciologist Matthias Huss crouches down near the middle of the massive glacier and checks the measurements. Analysis of the data gathered from Aletsch, the largest glacier in the Alps, paints a dire picture of the toll that climate change is taking on the behemoth. (Photo by Fabrice Coffrini/AFP Photo)

Children jump over a puddle of water as they play during a rainstorm on a street in Barcelona, Spain, Saturday, September 18, 2021. (Photo by Emilio Morenatti/AP Photo)

Giant pandas are playing and foraging inside the Shenshuping base of China Conservation and Research Center for the Giant Panda in Wolong National Nature Reserve on November 3, 2021 in Aba Tibetan and Qiang Autonomous Prefecture, Sichuan Province of China. (Photo by An Yuan/China News Service via Getty Images)