Haplorhines are a group of primates that include monkeys, apes, and humans. They are characterized by their dry noses and larger brains compared to other primates. This group is known for their advanced social behaviors and complex communication skills, which help them thrive in various environments. Within the haplorhine category, there are two main subgroups: tarsiers and simians. Simians further divide into New World monkeys and Old World monkeys, as well as apes. Haplorhines are fascinating because they share many traits with humans, making them important for understanding our own evolution.