Winds Of Change: North America's Wind Patterns Have Shifted Significantly In The Past 30,000 Years Science Daily — Dartmouth researchers have learned that the prevailing winds in the mid latitudes of North America, which now blow from the west, once blew from the east. They reached this conclusion by analyzing 14,000- to 30,000-year-old wood samples from areas in the mid-latitudes of North America (40-50°N), which represents the region north of Denver and Philadelphia and south of Winnipeg and Vancouver. Researchers (left to right) Yong Shu, Eric Posmentier, Xiahong Feng, and Anthony Faiia. (Photo by Joseph Mehling) The researchers report their...