Nihon University professor and head of Nihon University Animal Medical Center Kazuya Edamura, 49, points to cat photos on a computer screen, which are used to train the AI of “CatsMe!”, an AI-driven smartphone application jointly developed by tech startup Carelogy and researchers at Nihon University that purports to tell when a cat is feeling pain, as he gives a lecture to students on diagnosing pain in cats, at the medical center in Fujisawa, south of Tokyo, Japan on June 11, 2024. (Photo by Issei Kato/Reuters)

A man sleeps in a subway train in New York city on August 1, 2024. (Photo by Charly Triballeau/AFP Photo)

Bathers brave the cold waters of the North Sea as they take part in the annual Boxing Day dip at Redcar Beach on December 26, 2023 in Redcar, England. The event attracts hundreds of people each year, with many wearing fancy dress, who take to the water to help raise money for a number of charities. (Photo by Ian Forsyth/Getty Images)

Emily Whiteford, 18, of Maryland, stretches before her audition for the Radio City Rockettes at Radio City Music Hall, Wednesday, April 3, 2024 in New York. (Photo by Brittainy Newman/AP Photo)

Members of the Communist New Fourth Army on parade. Note how the modern equipment contrasts with the shoeless soldiers in the foreground. (Photo by Hulton Archive/Getty Images). 6th July 1946

A local boy plays football on Iracema Beach on June 11, 2014 in Fortaleza, Brazil. (Photo by Robert Cianflone/Getty Images)

“Harry Whittier Frees (1879–1953) was an American photographer who created novelty postcards and children's books based on his photographs of animals. He dressed the animals and posed them in human situations with props, often with captions; these can be seen as progenitors of modern lolcats”. – Wikipedia. Photo: “The nurse”. Photograph shows a puppy holding a kitten, 1914. (Photo by Harry Whittier Frees/Library of Congress)

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A soldier under Russian command restrains a colleague after he fired his weapon into the air and screamed orders to turn back at an approaching group of over 100 unarmed Ukrainian troops at the Belbek airbase, which the Russian troops are occcupying, in Crimea on March 4, 2014 in Lubimovka, Ukraine. (Photo by Sean Gallup/Getty Images)