We've known for a long time that humans are not "descended from apes" ... or at least, not any apes present on the planet today. The great apes, chimpanzees etc., share a common ancestor with humans, but they diverged a long time ago and went their own separate ways. Despite knowing this, a false assumption has persisted, that the common ancestor must have looked something like a chimpanzee. That notion has now been assigned to the trash can of scientific history. Fossil remains from about 4.4 million years ago that they are calling Ardi, show that a number of major changes had already occurred. Ardi demonstrates a number of features that modern humans possess, but chimps do not. For example, the teeth were already showing a marked reduction in size, and the skeletal remains show that it could function quite comfortably in both trees and upright on the ground. The discovery of 3.2 million year old Lucy was big news ... the discovery of Ardi is much more important. It's "back to the drawing board" time for a bunch of evolutionary scientists.