Researchers have mapped out the likely distribution of large mammals if human beings had never entered the picture.

Imagine there are no humans. 
As one group of researchers has done exactly that—they even made a map to show how the world might look sans homo sapiens. 

And not surprisingly, a world without human civilization would be somewhat similar to the African savanna of today. 

One of the study's authors explained, "The reason that many safaris target Africa i