A hyena stands chained to its handler at a circus in Gabasawa, Kano State, Nigeria, July 27, 2021. Hyenas are often viewed as repulsive and sinister, partly due to their scavenging habits in the wild, but in northern Nigeria some men keep the creatures in their homes, display them at festivals and even use their dung to make remedies. (Photo by Afolabi Sotunde/Reuters)

Emma Raducanu of Great Britain hits a return to Belinda Bencic of Switzerland during their quarterfinals round match on the tenth day of the US Open Tennis Championships the USTA National Tennis Center in Flushing Meadows, New York, USA, 08 September 2021. The US Open runs from 30 August through 12 September. (Photo by Justin Lane/EPA/EFE)

Freshmen take part in a military training at Chongqing City Vocational College on September 23, 2021 in Chongqing, China. (Photo by Chen Shichuan/VCG via Getty Images)

Orphaned mountain gorilla, Ndakasi, lies in the arms of her caregiver, Andre Bauma, on September 21, 2021 shortly before her death, which the park confirmed on September 26. Mr Bauma and others at the Senkwekwe Mountain Gorilla Center had cared for Ndakasi and other orphans for 13 years. Ndakasi had suffered a prolonged illness prior to her death. This is the only mountain gorilla orphanage in the world and takes in mountain gorilla orphans who have lost their families to poaching or conflict. A number of the orphans here were rescued from sales by poachers in sting operations carried out by Congolese National Park Authority (ICCN) rangers. (Photo by Brent Stirton/Getty Images)

A street vendor sells Dalgona candy from the Korean Netflix series “Squid Game” at a Dalgona shop in Seoul, South Korea, October 1, 2021. (Photo by Heo Ran/Reuters)

A protester spits fire during a protest to mark the second anniversary of months of civil unrising against social inequality, in Santiago, on October 18, 2021. The social-justice protests that rocked Chile in October 2019 led ultimately to the decision to create a new constitutional convention to draft a constitution to replace the one written during the dictatorship of Augusto Pinochet (1973-1990). The new 155-member the new body is in charge of writing a new constitution meant to pry power from the hands of the elite and spread it more equitably in the South American nation. (Photo by Martin Bernetti/AFP Photo)

A woman wearing in face mask to curb the spread of COVID-19 passes street's cafe in Kyiv, Ukraine, Friday, October 22, 2021. Coronavirus infections and deaths in Ukraine have surged to all-time highs amid a laggard pace of vaccination, which is one of the lowest in Europe. (Photo by Efrem Lukatsky/AP Photo)

African ostrichs are seen during sunny autumn day in the largest ostrich farm “Nornieki” in Snepele, Latvia, 18 October 2021. (Photo by Toms Kalnins/EPA/EFE)