Medieval monks recorded hundreds of lunar eclipses. Centuries later, their descriptions are helping scientists unravel the role of volcanoes in historical climate change.
Natural records suggest a cooling trend was underway thousands of years ago.
DeAgostini/Getty Images
Study using tree ring data and climate projections shows that buildup of CO2 will not benefit most northern forests and that growth rates will actually fall.
The extreme architectural investment in Chaco Canyon typifies periods of peak building.
Nathan Crabtree
Multiple times over the centuries, climate issues caused Pueblo farming to collapse, taking the establishment down with it. New research suggests there are parallels with American inequalities today.
Researchers compared the shipwreck history to tree ring data from slash pines to piece together the hurricane history over past centuries.
Grant Harley
In an attempt to better understand hurricanes, researchers recreate hundreds of years of hurricane records with Spanish shipwreck logs and tree ring data.
High and dry: a water-stressed forest in the US Southwest.
Leander Anderegg
After unifying the Mongols, Genghis Khan led his army from Northern Mongolia in 1211 to the Caspian Sea in 1224, forging the largest contiguous land empire in history. For centuries, common wisdom held…