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.

There have been some friendships lost over this. That's the most difficult for me. I find it very uncomfortable to know that I was at one time close friends with someone, and because of jealousies and misunderstandings and so on, these friendships have dissolved.

My real father died when I was two years old, so I never knew him. He was a barber in Chicago.

In our case, finding a Lucy is unique. No one will ever find another Lucy. You can't order one from a biological supply house. It's a unique discovery, a unique specimen.

I was aware of it, but I grew up in a very a-religious family. My mother never went to church, she never had any religious training or background. It was never a part of our social interaction.

When I realized, in 1978, that Lucy did represent a new species of human ancestor, and that I had an opportunity to name this new species, I realized this was a revolutionary step in understanding human origins.

I was very intellectually oriented, very early on.

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

But it really wasn't until three to four years later, when we had an opportunity in the lab to make very detailed observations, and comparisons with other fossil discoveries, that we realized she was a new species of human ancestor.

And what I wanted to do was, I wanted to explore problems and areas where we didn't have answers. In fact, where we didn't even know the right questions to ask.

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.

When the first fossils began to be found in eastern Africa, in the late 1950s, I thought, what a wonderful marriage this was, biology and anthropology. I was around 16 years old when I made this particular choice of academic pursuit.

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.

I realized immediately that this was a terribly important discovery, but I didn't realize how important it would be until we had spent a lot of time in the laboratory studying it.

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.

I think that many of my ideas are correct, but I'll bet you, before my death other discoveries will be made that will prompt me to alter various ideas I have about human evolution.

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.

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.

Scientists are very afraid of being proven wrong.

This was the most important discovery I had ever made in my life. It was a discovery which has irrevocably changed my whole life's direction. It immediately elevated me to the status of one of the world's leading anthropologists.

Commitment, belief and positive attitude are all important if you're going to be a success, whether you're in sports, in business or, as in my case, anthropology.

Evolution explains our biological evolution, but human beings are very unique creatures. As the Dobzhansky said, all animals are unique; humans are the uniquest. And that uniqueness of being human, language, art, culture, our dependency on culture for survival, comes from the combination of traditional biological evolution.

I don't think we interbred with the Neanderthals at all. There are some people who think that there was some level of interbreeding. I think that we look so biologically different, that we looked and we acted so different, and we culturally were so different that we would not have had interbreeding between two species.

We are placed in the genus of Homo, which is Latin for man - Homo sapiens: supposedly wise men. I sometimes think - wonder - whether we really are wise men.

What makes us human depends on what place on our evolutionary path we're talking about. If you go back six million years ago, what makes us human is that we were walking upright. That's all. If you go to 2.6 million years ago, it's the fact that we're designing and making stone tools.

What's changed is we now have good anatomical, geological, archaeological evidence that Neanderthals are not our ancestors. When I wrote 'Lucy,' I considered Neanderthals ancestors of modern humans. We have gone back twice the age of Lucy, six million years. And we see that upright bipedal walking goes back that far in time.

Where we are going as a species is a big question. Human evolution certainly hasn't stopped. Every time individuals produce a new zygote, there's a reshuffling and recombination of genes. And we don't know where all of that is going to take us.

One has to take initiative in life to achieve what he or she wants.

Comfort is your biggest trap and coming out of comfort zone your biggest challenge.

We have enforced a Darwinian process on wolves, turning them into the shy and elusive animals they've become. They didn't have that fear of us 30,000 years ago. We didn't have gunpowder; we had rocks. Wolves would have seen us as lunch, and we were weak and slow and tasty.

In my gap year between college and drama school, I taught art at a hospice and worked at a little coffee shop across the street from Shakespeare's Globe Theatre in London when everything around it was still a construction zone.

Girl Up gives girls an opportunity and gives them a platform and starting point through which they can take it and run with it and help give girls the opportunity to have the freedom, independence and the ability to get an education.

I think the greatest records we've ever heard, from Zeppelin to Purple to Sabbath to The Who, were all recorded in the studio live.

When I was younger, I did a TV show in the U.K. for a couple years, and I learned a lot from that. It taught me a lot about being known amongst your peers and having to deal with a lot of derision from them.

I think of you with every waking moment of my life and dream of you with every dream that I have; I miss you.

It'd be impossible to capture the feel of 'All Quiet on the Western Front' in a novel starring Mace Windu; 'All Quiet' is a tragic coming-of-age story.

Motherhood has most definitely changed me and my life. It's so crazy how drastic even the small details change - in such an amazing way. Even silly things, like the fact that all of my pictures on my cell phone used to be of me at photo shoots - conceited, I know! - but now every single picture on my phone is of Mason.

Dislike what deserves it but never hate for that is of the nature of malice which is almost ever to persons not things and is one of the blackest qualities sin begets in the soul.

We can make a commitment to promote vegetables and fruits and whole grains on every part of every menu. We can make portion sizes smaller and emphasize quality over quantity. And we can help create a culture - imagine this - where our kids ask for healthy options instead of resisting them.

The jargon of sculptors is beyond me. I do not know precisely why I admire a green granite female, apparently pregnant monster with one eye going around a square corner.

The police protect us, and we're going to protect the police.

Performance is there, and if you are not there in that moment it happened, it just stays in the memory. It's so immaterial and something this immaterial is very difficult to collect. Its difficult to buy, its how we can buy immaterial art.

A recluse without books and ink is already in life a dead man.

I don't for the life of me understand how anybody could contemplate the results of the 2000 election in the US and say that electoral politics doesn't matter any more, and that Ralph Nader was right when he said there is no difference between the two parties.

If my Dad doesn't like you, you will know. My Mom is just too innocent to ever lie. She doesn't even cuss.

Academicians get nowhere.

If you run a corporation, your job is to maximize the return on investment for your investors. Good for you. But by the same token, we have to remember that corporations have no compassion. That's why legislation and regulations are necessary.

Once you're signed to a label you compromise.

Marketing is a core part of anything you do.