Biologist Ricardo Freitas examines a broad-snouted caiman captured in the Marapendi Lagoon in Rio de Janeiro, Brazil, Friday, July 16, 2021. Thousands of caimans living in lagoons adjacent to what was once the Olympic Golf Course are closely monitored by scientists, who hope to protect their numbers and encourage local residents to be environmentally conscious about living next to the scaly creatures. (Photo by Bruna Prado/AP Photo)
