I'm a biologist. At my core, I'm a naturalist.
In my heart, ever since I [was] a little kid, I've been an explorer.
I think a human animal is far more wild and unpredictable and dangerous and destructive than any other animal.
What drives me is that moment of discovery. I love the unknown.
We are not far away from the point of no return when it comes to life on earth, and we have some radical choices to make.
I'm really worried about what the world is going to be like when my daughters are young women, [when] they are young leaders or mothers or businesspeople - whatever they're going to be. I'm afraid they're going to have a less healthy and less biologically rich planet.