I cannot remember a time when I did not want to go to Africa to study animals.

If you educate women, family size tends to go down.

You know the old expression "We haven't inherited the world from our parents, we've borrowed it from our children"? Well it's just not true. We haven't borrowed anything.

Be assured that our individual actions, collectively, make a huge difference.

The tree I had in the garden as a child, my beech tree, I used to climb up there and spend hours. I took my homework up there, my books, I went up there if I was sad, and it just felt very good to be up there among the green leaves and the birds and the sky.

We have a responsibility toward the other life-forms of our planet whose continued existence is threatened by the thoughtless behavior of our own human species. . . . Environmental responsibility – for if there is no God, then, obviously, it is up to us to put things right.

Just think of the trust that often exists in soldiers. Within their own unit, you could say they have to trust each other. A spirit of camaraderie builds up and, in the end, they will risk their lives for each other. They may even go so far as to dehumanise the other, enemy group - a mechanism you can also observe in chimps.