Expanded exploration and study of groups throughout the world through archeology and the new field of anthropology in the late 19th century led to a revival or reworking of accounts of the Lost Tribes.[25] For instance, because archeological finds of the Mississippian culture's complex earthwork mounds seemed beyond the skills of the Native American cultures known to European Americans at the time of their discovery, it was theorized that the ancient civilizations involved in the mounds' construction were linked to the Lost Tribes. They tried to fit new information into a biblical construct.[26] However, the earthworks across North America have been conclusively linked to various Native groups, and most archaeologists now consider the theory of non-Native origin to be pseudo-science and even racist.[27]