Like most Americans of immigrant ancestry, I am a mutt. I have English, German, Scottish, Irish, and who knows what else.

This is all well and good, but in reality we are all more alike than we are different, at least physically. I was watching a program the other day and it says that the genetic diversity of all of mankind is less than that of a family group of chimpanzees. It seems that ages ago, the human race was almost wiped out to about 10,000 members, and all of us are descended from them.