Another factor possibly upsetting the East African environment at the time was ... while the east became more arid and dominated by savanna. As a result, he hypothesizes, the common ancestors ...

The "Preamble" and "Articles" of the Free African Society (FAS) provide a succinct portrait of the organization, the first of its kind in Philadelphia, and probably the first in America.

A pest to ranchers, a prize to hunters, and a temperamental tank to anything that bothers it, African buffalo roam ... the West Africa savanna buffalo, and the Central Africa savanna buffalo.

But they are vibrant ecosystems, and some, like the African savanna, are home to the animal kingdom's most recognizable fauna.