Students from St Andrews University are covered in foam as they take part in the traditional Raisin Weekend in the Lower College Lawn, at St Andrews in Scotland on October 22, 2018. The “raisin weekend” stems from a gift of raisins (now flour and foam) traditionally given by a first year student to their academic “parents” in gratitude for their guidance. (Photo by Russell Cheyne/Reuters)

Men slide in the mud during the Boryeong Mud Festival at Daecheon Beach in Boryeong, South Korea, Saturday, July 22, 2017. The 20th annual mud festival features mud wrestling and mud sliding. (Photo by Ahn Young-joon/AP Photo)

A Goodfellow's Tree Kangaroo joey with its mother at Sydney Zoo in Australia on January 22, 2021. The 28-week-old male joey, who is yet to be named, has only just begun to pop his head and shoulders out of his mum's pouch. (Photo by Taronga Zoo via Reuters)

Police officers detain a Femen activist during a demonstration of supporters of former Spanish dictator Francisco Franco, during annual gathering held on the week of the 45th anniversary of the dictator's death, in Madrid, Spain, November 22, 2020. (Photo by Javier Barbancho/Reuters)

Indonesian men carry their belongings as they wade through the water at a flooded neighborhood following heavy rains in Bekasi, Indonesia, Monday, February 22, 2021. Thousands of residents are being evacuated on the outskirts of Indonesia’s capital amid flooding after the Citarum River embankment broke. (Photo by Achmad Ibrahim/AP Photo)

Birds are seen at Kizilirmak Bird Paradise in Turkey's Samsun on April 22, 2021. Kizilirmak Delta Bird Sanctuary, which is on the UNESCO World Heritage Tentative List and hosts 359 to 487 species of birds in Turkey, became more active with the arrival of spring. (Photo by Mehmet Kumcagiz/Anadolu Agency via Getty Images)

A man stands on a jetty on the fog-shrouded Victoria Harbour Wanchai in Hong Kong, China, 22 March 2022. Fog is common in Hong Kong in spr​ingtime when the territory is affected by alternate cold and warm air. (Photo by Jerome Favre/EPA/EFE)

Ukrainian army soldier Dasha, 22, checks her phone after a military sweep to search for possible remnants of Russian troops after their withdrawal from villages in the outskirts of Kyiv, Ukraine, Friday, April 1, 2022. (Photo by Rodrigo Abd/AP Photo)