Latest Laboratory of Tree-Ring Research Stories
Researchers with the University of Arizona (UA's) have discovered evidence of a formerly unknown, decades-long drought that occurred in the southwestern United States in the second century.
Droughts in the late 20th century rival some of North Africa's major droughts of centuries past, reveals new research that peers back in time to the year 1179.
An epic drought during the mid-1100s dwarfs any drought previously documented for a region that includes areas of Arizona, Colorado, New Mexico, Utah and Wyoming.
The increase in the number of large western wildfires in recent years may be a result of global warming, researchers say.