Latest Issue of Science News   DNA reveals details of the
peopling of the Americas  Migrants came in three distinct waves
that interbred once in the New World Magazine issue:  Sponsor
Message  The first people to settle the Americas had a
distinctive genetic style, and additional waves of migrants
added regional flair, a new analysis of mitochondrial DNA from
Native Americans from Canada and the United States suggests.
About 15,000 to 18,000 years ago, the first migrant wave spilled
from Asia down the Pacific coast and then pushed inland,
eventually peopling the land from “the tip of South America all
the way to Hudson Bay,” says Andrew Kitchen, a genetic
anthropologist at the University of Iowa who was not involved in
the new research. That first migrant wave contained the
ancestors of all South and Central American tribes, and North
Americans, too. But something different was going on in North
America, an international team of researchers has discovered.
The scientists examined the DNA of mitochondria, ti