I think when you work on fossils, and you realize that a species is there, and it's abundant for quite a long period of time, and then at some point it's no longer there - and so, when you look at that bigger picture, yes, you realize that either you change and adapt, or, as a species, you go extinct.

In the rush of today's world, and with more than half of us now living in cities, the majority of people are less and less connected with the spectacle of Nature.

If you want to become a fossil, you need to die somewhere where your bones will be rapidly buried. You then hope that the Earth moves in such a way as to bring the bones back up to the surface.

Who are we? That is the big question. And essentially we are just an upright-walking, big-brained, super-intelligent ape.

My father so appropriately put it that we are certainly the only animal that makes conscious choices that are bad for our survival as a species.

I think when you work on fossils, and you realize that a species is there, and it's abundant for quite a long period of time, and then at some point it's no longer there - and so, when you look at that bigger picture, yes, you realize that either you change and adapt, or, as a species, you go extinct.

What is it that really makes us, us? It's our collective intelligence. It's our ability to write things down, our language and our consciousness.