A caiman in the Pantanal region of Brazil in 2021. They are used to seeing humans, allowing the photographer, Leighton Lum, a close-up shot. (Photo by Leighton Lum/Caters News Agency)

Third place: the rear leg, claw and respiratory trachea of a louse (Haematopinus suis). (Photo by Frank Reiser/Nassau Community College/Nikon Small World Photomicrography 2021)

Brown-throated sloth called “43”, rescued by Juan Carlos Rodriguez and his wife Haydee in a residential area, waits in the kennel getting prepared for being released, at the couple's shelter for sloths, in San Antonio, Venezuela on July 30, 2021. (Photo by Leonardo Fernandez Viloria/Reuters)

American singer-songwriter Olivia Rodrigo poses at the Academy Museum of Motion Pictures gala in Los Angeles, California, U.S. September 25, 2021. (Photo by Ringo Chiu/Reuters)

A hiker admires the view as Mt. Etna, Europe's largest active volcano, erupts in the background, in the Bove Valley of Etna Park, on the eastern slope of Mt. Etna, in Sicily, southern Italy, Sunday, July 4, 2021. Since Feb. 16, 2021, Mt. Etna has begun a series of eruptive episodes. (Photo by Salvatore Allegra/AP Photo)

A customer plays “Red Light, Green Light” game from the Netflix show “Squid Game” at Strawberry Cafe in Jakarta, Indonesia, October 15, 2021. (Photo by Ajeng Dinar Ulfiana/Reuters)

Palestinian athlete Ahmed Abu Hasira demonstrates his parkour skills during a lockdown amid the coronavirus disease (COVID-19) outbreak in Gaza City on September 8, 2020. (Photo by Mohammed Salem/Reuters)

A demonstrator confronts a police officer outside the 18th District Police station during a rally after the death of Walter Wallace Jr., a Black man who was shot by police in Philadelphia, Pennsylvania, U.S., October 27, 2020. (Photo by Bastiaan Slabbers/Reuters)