The International Union for Conservation of Nature has updated its Red List of Threatened Species Maria Pasquini is the staff editor for human interest’s digital vertical at PEOPLE. She has been ...

Two of London Zoo's smallest primates have had a special trip to the dentist. Five-year-old Endangered pygmy slow loris Ernest and black-capped squirrel monkey Nuka were brought into the ...

However, monkey lifespans among species range from 10 to 40 years ... Unknown in the wild These monkeys are the smallest of the Old World monkeys standing only about a foot tall.