My epitaph says: 'We'll make this a comedy yet.' I've already planned it.

By my friends and loved ones as someone who loved ferociously and always had their back.

I’d like a manoeuvre called after me, in the way Heimlich has.

As someone who had a laugh.

What in a way pleases me and makes me very proud, and I probably shouldn't be, is that I am an honorary fellow of the five oldest academies of the world, all five of them and I don't know whether there's anybody else who can say that.

There's only one thing where I… if I had the opportunity to live my life over again where I probably would make a change.…I think if I had shortened that period and had earlier begun to work on basic evolutionary theory on history of biology and particularly on the philosophy of biology, I could have achieved some things which now I will never be able to achieve because at age 93, one knows that one doesn't live forever.

My father had a wonderful library, and we always bought books galore, and I devoured all the books of explorers that went to various places in the world. I admired what Humboldt had done and Bates and Darwin and the Swedish explorers, Sven Hedin and others. I was dreaming all the time about someday being an explorer, going to the tropics, going to the jungles, seeing new things, discovering strange animals and so forth, but of course it was a dream world.

Well, this meant 16 months' time to do all the work for a doctor in zoology, including writing a thesis, and it meant working 16 or 17 hours every day and no such things as Saturdays or Sundays or vacations or going to the movies or going out with girls. I just... it was a total grind for 16 months. But I made it;

I always think about things, and if something puzzles me… Well, that of course was one of Darwin’s secrets. Whenever something puzzled him, he tried find a theory. He made a conjecture, as (Karl) Popper would call it, and see if it worked out and that’s true even today.

That is a difficult question to answer because I’ve worked in so many fields. I’ve worked in five different fields. Now which are the most important? In some ways, the development of the biological species concept, which I did not invent, but I certainly was the person that brought it to general knowledge. And the whole field of new systematics — I really am the one who developed it — was one of my major contributions. There’s another one, which is still not yet realized by almost anybody. I have done more, I believe, for the development of a philosophy of biology than any other person.