An even more contentious aspect of peopling the Americas relates to tracing the origins of the technology that produced the Clovis points and their successors. The distinctive, beautifully crafted, bifacial fluted flint spearheads are clearly a feature of the people who moved into North America. There is, however, virtually no evidence of similar artefacts in Siberia. By way of contrast, an almost identical form of technology existed in southwestern France between 21 and 17 kya, associated with the people known as Solutreans. This coincidence has led a proposal that maybe these people, fleeing from the full rigours of the LGM, somehow crossed the Atlantic and became among the earliest settlers in North America. (Climate Change in Prehistory)