Running is my addiction. It's always present. I'm constantly thinking about my next run.

What drives me is that moment of discovery. I love the unknown.

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.

I'm a biologist. At my core, I'm a naturalist.

When you're in the middle of nowhere, when you're on this tiny little island, probably one of ten people ever to step foot on this island, it's taken you a week to get there by boat - and you step near to an albatross nest. It doesn't even look at you as the enemy. You get this great nature moment. Until you realize the albatross, along with the thousands of other winged albatrosses next to it, has constructed its nest of trash.

The challenge is that we live in a time where there's a lot of crap on television.

In my heart, ever since I [was] a little kid, I've been an explorer.