The subtitle of your book said is provocative, an exploration of medicine and the new human. And you say that future humans will, I'm quoting you here, be rebuilt anew with modified cells. And these new humans will look and feel mostly like you and me. So presumably they'll look and feel a little bit better. Then how do you think about the new human?

Well, the subtitle of the book is purposefully provocative. I wanted to get away from this idea of the new human as kind of a robotic sort of loop-ill, swallowing, piano-reaves creature in a black boom. I wanted to get to the idea that we're already there. And sometimes that's interesting because people think about the future as if we're not there. But sometimes it's important to remind people that we've already crossed thresholds that have put us already there. And that's why I bring up the idea of the new human. The new human is to me someone where we're manipulating cells and genes. It's someone who might have an organ that we've built out of cells that we manipulated. It might be someone in whom we've inserted electrodes to stimulate brain circuits so that they're not depressed. But most importantly, the new human to me is not, and this is very important to me as a physician and as a scientist, is not someone that we're trying to augment, but is someone who we're trying to heal. And that distinction remains extremely important for me. I'm not interested in augmenting humans. I'm interested in healing humans. There might be other people who are interested in augmenting humans, making them, I don't know, taller, smarter. I'm not there. I am interested in healing humans who have sickness, healing humans who are vulnerable, healing humans who have debilitating illnesses through cell and gene and other therapies. That human being is much more interesting to me. It's a much more empathetic way to think about new humans than this kind of enhancement of augmented, robotic, loop ill-swallowing creature that exists in science fiction. I'm not interested. Other people are, I'm fine with it. Great. I'm a doctor. I like healing people. I'm interested in healing people. I'm interested in other people healing people. I'm interested when those people come alive from the dead. And when they come alive from the dead because of gene and cell therapies, because we know what things we invented, they're new humans to me.