Lucy brought with her an image of our human ancestors that you don't get when you find a jaw or an arm bone or a leg bone. Here was 40 percent of a single skeleton.

But what really excited me was the idea that humans had a tremendous pre-history that went back millions of years. I wanted to go to Africa to find some of these creatures.

As an undergraduate, I had an opportunity to go on a number of archeological digs. So I had experience excavating, digging up remains of ancient Indian villages in the Midwest and in the Southwest.

Normally, we are happy to find a fragment of jaw, a few isolated teeth, a bit of an arm, a bit of a skull. But to find associated body parts is extremely rare.

Most Achievers I Know Are People Who Have Made A Strong And Deep Dedication to Pursuing A Particular Goal. That Dedication Took A Tremendous Amount Of Effort.

Scientists are very afraid of being proven wrong.

One has to devote oneself to a particular pursuit. To be successful at anything, you have to make a total commitment to it.