We canvassed the world of the social and behavioral sciences, looking for rising stars whose careers promise to make a lasting mark. We'll be profiling the top 30 throughout the month of April.
Until recently, the reigning theory on who the first Homo sapiens in North America were pointed to the Clovis people, evidence of whose culture was discovered in the American Southwest. That theory has been powerfully challenged by, among others, Meadowcroft, an archaeological dig in western Pennsylvania that began in the 1970s.