A couple hugs while standing near a Christmas tree made out of plastic bins and plastic hampers outside the Museum of History in Monterrey, Mexico, December 4, 2015. The humble Christmas tree has a rich history, from evergreen trees used to symbolise eternal life in Ancient Egypt to tree worship among pagan Europeans. The modern version has its origins in Germany, where the song “O Tannenbaum” is still a festive favourite. Today the traditional tree with lights and decorations appears in cities including Washington, Moscow and Beirut. Alternative constructions range from recycled rubbish in Mexico City to old window frames in Rakvere, Estonia. Whatever the shape or size, the message is the same: Merry Christmas. (Photo by Neil Hall/Reuters)

A pair of tigers soak in a shallow pool at Tiger Temple, a Buddhist monastery where paying visitors can interact with young adult tigers, in Kanchanaburi, Thailand, March 16, 2016. The attraction, near the Myanmar border, started collecting the animals 15 years ago when villagers brought an injured tiger cub to the local abbot, who agreed to care for it. Today there are nearly 150 tigers at the monastery. (Photo by Amanda Mustard/The New York Times)

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)

Tiril Eckhoff of Norway in action during the Women's Biathlon 4x6km Relay race at the Zhangjiakou National Biathlon Centre at the Beijing ​2022 Olympic Games, Zhangjiakou, China, 16 February 2022. (Photo by Martin Divísek/EPA/EFE)

Figure skater Alexandra Trusova of Team ROC practices during a training session at the 2022 Winter Olympic Games, at the Capital Indoor Stadium in Beijing, China on February 19, 2022. (Photo by Valery Sharifulin/TASS)

A security personnel keeps watch before the second plenary session of the National People's Congress (NPC) at the Great Hall of the People in Beijing, China on March 8, 2022. (Photo by Carlos Garcia Rawlins/Reuters)

Kazakhstan's Elena Rybakina (L) checks on France's Alize Cornet after resulting injured during their women's singles tennis match on the fourth day of the 2023 Wimbledon Championships at The All England Tennis Club in Wimbledon, southwest London, on July 6, 2023. (Photo by Glyn Kirk/AFP Photo)

Giant pandas eat at Chongqing Zoo in Chongqing, China on September 23, 2023. (Photo by Costfoto/NurPhoto/Rex Features/Shutterstock)