More on early migrations to North America

http://www.nature.com/news/genomes-and-fossil-faeces-track-the-first-americans-1.11006
This is a more scientific article about the new evidence for early migrations to America. Evidence is based on DNA analysis and on (one of my favorite words) coprolites--fossilized feces (because this is a British publication, they use the spelling "faeces," which looks very Latin!).