Since Berlyne’s groundbreaking work in the 1960’s, curiosity has been a popular topic for psychological research. Despite a rich history of research, scientists have not been able to agree upon a single definition or taxonomy of curiosity. These diverging perspectives have led to a breadth of research that has yet to be integrated under one framework. Moreover, most research on curiosity has focused on neural mechanisms and ontogenetic characteristics, while the evolutionary aspects of curiosity have received little attention. I propose that research on curiosity can benefit from an evolutionary perspective, and more broadly from a biological perspective on information-gathering behavior. In this chapter, I synthesize the literature on curiosity from the perspective of behavioral biology – i.e., Tinbergen’s four questions. The behavioral biology framework provides a powerful lens through which questions about behavior can be asked and iterative empirical work and theoretical construction can take place. In particular, I argue that evolutionary perspectives on curiosity can help identify the “joints” of nature at which curiosity may be carved. By identifying the function of different types of