One of the primary goals of THBI is to uncover the biological basis of intelligence. To make progress on this challenging question, THBI investigators from various disciplines work collaboratively using multiple methods of inquiry. THBI's array of reseach centers (the Brain Imaging Center, Nonhuman Primate Research Center, Child Cognition Center and others) showcases their breadth of tools and methodology: from brain imaging to genetic engineering to comparative cognition-studies directly comparing humans, nonhuman primates, and other animals. Current research projects investigate neural mechanisms of language and music, cognitive and neural signatures of humans’ and nonhuman primates’ social interactions, and the neuroscience of emotion and decision-making. Eventually, THBI aims to fully chart the cognitive and biological nature of intelligence, understanding its universality and differences across species.