Those were venturesome steps for some ape-like creatures long ago in Africa. Dropping out of trees, they essayed a ... range beyond the forest to the open savanna. Perhaps they needed to free ...

They can look desolate, generally containing few or no trees, except in areas along rivers and streams. But they are vibrant ecosystems, and some, like the African savanna, are home to the animal ...

or a savanna. These animals are best adapted to vast expanses of grassland with scattered trees, where the climate is hot, year-round. Savannas cover almost half the surface of Africa and large ...