Twenty-three hundred years ago, when Euclid and Archimedes wandered Alexandria, and Cleopatra's family controlled the Egyptian throne, revolts and territorial disputes were common. These uprisings ...

This is one of the most outstanding volcanic regions in the world, with a high density of active volcanoes, a variety of types, and a wide range of related features. The six sites included in the ...

Cartoons from earlier can be viewed here.