There are very few things I've done just twice in my life, 40 years apart, and one is to backpack on the Pacific Crest Trail across the California/Oregon border.

Humans pull together in an odd way when they're in the wilderness. It's astonishing how few people litter and how much they help one another. Indeed, the smartphone app to navigate the Pacific Crest Trail, Halfmile, is a labor of love by hikers who make it available as a free download.

Knowledge is very important and one of the few things that accompanies us into the next life.

There are very few things in the body that nitric oxide doesn't regulate.

There are very few things that surprise me.

I've never eaten just a few bites of things I liked in my life.