Science fiction [is] the kind of writing that prepares us for the necessary mutations brought about in society from an ever changing technological world and as a result. The mainstream hasn’t excluded SF; the mainstream has excluded itself. No one told Jules Verne he was a science fiction writer, but he invented the 20th century.

If it were only a few degrees, that would be serious, but we could adapt to it. But the danger is the warming process might be unstable and run away. We could end up like Venus, covered in clouds and with the surface temperature of 400 degrees. It could be too late if we wait until the bad effects of warming become obvious. We need action now to reduce emission of carbon dioxide.

I protest against the use of infinite magnitude ..., which is never permissible in mathematics.

Science has to be understood in its broadest sense, as a method for apprehending all observable reality, and not merely as an instrument for acquiring specialized knowledge.

Scientists in different disciplines don't speak the same language. They publish in different journals. It's like the United Nations: You come together, but no one speaks the same language, so you need some translators.

I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind.