There's a good chance that many of you watching right now have a dog somewhere nearby. But what do you actually know about where dogs come from. You're probably aware they evolved from wolves, but how and when.It turns out much of that is still a mystery. There are some intriguing clues, however, that have been discovered in the DNA of dogs and wolves. Clues that just might give us a better understanding of how they and we evolved.You've heard of survival of the fittest, but a scientist at Duke University s ...