If we studied human beings which can include human genes, human blood samples, and human behavior, then you can leave the animals out of the labs and you can leave them off your plate.

The Stone Age gave us arrow heads and eventually knives, and that allowed us to kill animals in ways you couldn't before, and once you had them you were able to remove the skin and bones.

Overall, our population is in the worst shape it's ever been. Children are in terrible shape. We have absolutely unprecedented numbers of obese and overweight children - one in three now. A generation ago it was something like one in ten.

In my own life, I decided to leave meat off my plate in medical school, but was a bit slow to realise that dairy products and eggs are not health foods either.

Dogs have a sense of smell much greater than ours and they're much faster than we are. We have fairly dull senses, fairly slow locomotion. In our Olympic trials, we celebrate speeds that would be an embarrassment to a bird or a dog or another animal.

Medicine is often conservative and slow to incorporate something that wasn't there before and that we're afraid people are going to laugh at us for. But, the beauty of music is - well, a couple things. There are no side effects that are harmful. Music doesn't do that. It doesn't have any negative effects whatsoever. So I do think it's going to come, but I think it's a new idea for people.

Since I first went to India twenty some years ago, there's been a palpable change. There's now pizza everywhere, meat is much more popular than it's ever been. Vegetarianism is "that quaint thing our parents did."