What happened to "random mutation"?
WASHINGTON (Reuters) - Chimpanzees and humans split from a common ancestor just 4 million years ago -- a much shorter time than current estimates of 5 million to 7 million years ago, according to a study published on Friday.
The researchers compared the DNA of chimpanzees, humans and our next-closest ancestor, the gorilla, as well as orangutans.
They used a well-known type of calculation that had not been previously applied to genetics to come up with their own "molecular clock" estimate of when humans became uniquely human . . . . .
. . . . ."Primate evolution is a central topic in biology and much information can be obtained from DNA sequence data," Dr. Asger Hobolth of North Carolina State University said in a statement.
The theory of a molecular clock is based on the premise that all DNA mutates at a certain rate. It is not always a steady rate but it evens out over the millennia and can be used to track evolution.
Sounds a lot like John A. Davison's theory of "prescribed evolution."