Primates are unique mammals that took a great leap during the course of evolution to enlarge their brains and become the most intelligent animals on our planet. The primate world includes lemurs and bush babies, tarsiers and pottos, monkeys and apes, and of course humans. In Anja Reserve, Madagascar, we follow a family of ring-tailed lemurs for a day. Led by a dominant female, the families face bitterly cold nights, and must find food and evade predators.