Map Showing Vegetation of Africa (IMAGE) U.S. National Science Foundation. Caption. Savanna and woodland extend across a broad swath of East Africa. Credit. AccessAfrica.

Sequences of vegetation types caused by regularly repeated physiographic or hydrographic conditions are shown as "catenas"—a word originally applied to soils in East Africa. The map brings out ...

LAST month Kai Krause, a computer-graphics guru, caused a stir with a map entitled "The True Size of Africa", which showed the outlines of other countries crammed into the outline of the African ...