AMHERST, Mass. - Sudden climate changes may have been a major factor in the collapse of several societies during the past 10,000 years, according to a study by a team of researchers with ties to the University of Massachusetts. The study offers an intriguing window on the future, the scientists suggest. Raymond Bradley and Harvey Weiss offer details in the Jan. 26 issue of the journal Science. Bradley is head of the geosciences department at UMass. Weiss, a Yale University archeologist, holds an adjunct post at UMass. Funding for the project came from a variety of sources, including the National Science Foundation, the National Endowment for the Humanities, and the U.S. Department of Energy.