American artists have drawn criticism after making stunning, intricate sculptures by pouring hot liquid aluminium into anthills.

Sonny Colbrelli of Italy celebrates winning the men's Paris Roubaix, a 258 kilometer (160.3 miles) one-day-race cycling race, at the velodrome in Roubaix, northern France, Sunday, October 3, 2021. (Photo by Vincent Kalut/Pool Photo via AP Photo)

Children pour cold water on themselves under the control of fitness coach Margarita Filimonova (R) at local kindergarten number 317, with the air temperature at about minus 23 degrees Celsius (minus 9.4 degrees Fahrenheit), in Russia's Siberian city of Krasnoyarsk, February 5, 2013. (Photo by Ilya Naymushin/Reuters)

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An Afghan policeman frisks a man while a burqa-cald woman sits in the trunk of a car on a roadside in Herat, Afghanistan, 05 July 2015. At least 18 police, two civilians and 30 rebels were killed in central Afghanistan during three days of fierce fighting, police said on 04 July. The clashes ended 04 July after security forces retook control of nine police checkpoints that had fallen to the rebels. (Photo by Jalil Rezayee/EPA)

A man walks pat sculptures with face masks on along an alley in Beijing on August 3, 2021. (Photo by Noel Celis/AFP Photo)

People observe a protest against a new citizenship law from a bus, in New Delhi, India, January 3, 2020. (Photo by Anushree Fadnavis/Reuters)

A tourist takes photographs of the Louvre Museum in Paris, France on July 3, 2022. (Photo by Benoit Tessier/Reuters)