It is hard to overstate how valuable it is to have all the incredible tools that are used for human disease to study plants.

Some very poor countries run great vaccination systems, and some richer ones run terrible programs.

I think of myself as a global citizen.

I don't think you're as capable of handling lack of sleep or whatever challenges you throw at your body as you get older. However, I never missed a day of work.

Harnessing steam power required many innovations, as William Rosen chronicles in the book 'The Most Powerful Idea in the World.'

We'll have infinite bandwidth in a decade's time.

This social-networking thing takes you to crazy places.