To do that, we must investigate what is called the Medieval Warm Period by historians. This period began around 800 CE and ended around 1300 CE. During it, Europe and Northern Africa saw a drastic ...

Medieval monks recorded hundreds of lunar eclipses. Centuries later, their descriptions are helping scientists unravel the role of volcanoes in historical climate change.

We may need to rethink that old expression "Greenland is ice, Iceland is green." New research published Tuesday says that ...