The Yallitians are a sophisticated and cultured humanoid mammalian species. Their enlarged skulls, extending up to twenty centimeters above their foreheads, housed complex binary brains, provided with sufficient blood by an extra heart in their heads. The binary structure of Yallitian thinking helped them to ponder two sides of an issue at once. It also enables them to process information and solve problems rapidly. Because of their thoughtful nature, they tended to be calm, rational, and analytical, preferring peaceful philosophies and a lifestyle which worked in harmony with nature. Though the quick-thinking Yallitians had equally quick reflexes, they were commonly not as well coordinated as Humans.