What a 4,000-year-old bad hair day tells us.

• Position: ANTHROPOLOGY - Brief article

All that remained of the ancient Greenlander were a few clumps of hair, so thick that it was first thought to be from a bear. But well-preserved DNA in the 4,000-year-old hair has enabled scientists at the University of Copenhagen in Denmark to decode the man's genome, or genetic information. It's the first time that the entire genome of an ancient human has been analyzed. The researchers now have a good idea of what Inuk, as they call him, looked like and where he came from: His closest genetic relatives lived on the eastern tip of Siberia, which points to a previously unknown migration of people across North America, from Siberia to Greenland, 5,500 years...