A baby marmoset, three or four months old, takes its first steps in Rio De Janeiro, Brazil on March 18, 2025. The little primates are common in the south of the country. Many are former pets freed by their owners; they thrive in Brazil, where their cuteness means people often offer them food, which is frowned upon by ecologists. (Photo by Bob Karp/Zuma Press Wire/Rex Features/Shutterstock)
