Natasha, a female chimpanzee at the Ngamba Island sanctuary for chimpanzees in Uganda, is a relative genius compared with her mates, according to researchers from the Max Planck Institute for Evolutionary Anthropology. Natasha consistently outscored even her companions on tests designed to measure multiple aspects of intelligence. The results come as no surprise to the most experienced keepers at the sanctuary, who all ranked Natasha as the smartest chimpanzee. Natasha has kept keepers on their toes with numerous escapes and her fondness for teasing humans by luring them close, then spraying them with water.