Question: Are you generally optimistic or pessimistic about the way the world is headed?

Transcript: I am an optimist in general. In fact I have always believed that you can’t be a scientist unless you are an optimist, because experiments fail more often than they succeed. But I must say that at the moment, I am not terribly optimistic about where we are globally. I do not see many leaders stepping up and leading. And I think until we see those kinds of people rising up, I don’t see how we are going to solve some of these major issues that we face as a society.