A great crested grebe feeds a chick sitting on its mother’s back on a lake in Cáceres, Spain. (Photo by Jose Luis Ruiz/Solent News & Photo Agency)

Skywhale and Skywhalepapa, created by artist Patricia Piccinini before flying over Melbourne on March 19, 2022 in Melbourne, Australia. It is the first time Piccinini's work Skywhales: Every Heart Sings has flown over Melbourne, as part of MPavilion. (Photo by Asanka Ratnayake/Getty Images)

Germany's Darja Varfolomeev competes with a ribbon during the individual apparatus final at the 41st FIG Rhythmic Gymnastics World Championships at Carioca Arena, in Rio de Janeiro, Sunday, August 24, 2025. (Photo by Bruna Prado/AP Photo)

Egyptian bootblacks cleaning a European's shoes in Cairo. (Photo by Hulton Archive/Getty Images). Circa 1870

Young category winner. Great autumn morning by Fabian Dalpiaz. (Photo by Fabian Dalpiaz/2018 Astronomy Photographer of the Year)

Aurora Australis from Beerbarrel Beach, by James Stone. Runner Up: Aurorae. (Photo by James Stone/Astronomy Photographer of the Year)

Nic Smith poses to show her body art during the 10th International Tattoo Convention in London September 27, 2014. (Photo by Neil Hall/Reuters)

HRP-4C, a five-foot humanoid robot developed at Japan's National Institute of Advanced Industrial Science and Technology, sings and dances with performers at the Digital Contents Expo in Tokyo on October 17, 2010. The robot runs entertainment software called Choreonoid, a name formed from the words “choreograph” and “humanoid”. (Yoshikazu Tsuno/AFP)