Going out in the field, it's always enlightening to see what's working and what's not and to sit down and talk - I was with young girls in south Africa - understanding why our tools for prevention aren't being adopted, and what way may need to invent to help protect them.

Digital reading will completely take over. It's lightweight and it's fantastic for sharing. Over time it will take over.

Almost every way we make electricity today, except for the emerging renewables and nuclear, puts out CO2. And so, what we're going to have to do at a global scale, is create a new system. And so, we need energy miracles.

You don't have to own a TV network to go out and do a cool show.

Contraception really shouldn't be all that controversial because it's a tool a woman can use to delay her first birth until she's, say, 18 or 19 years old.

The vision is that people should have the ultimate in convenience. Being able to get the things they care about on the appropriate device.

Life is a lot more fun if you treat its challenges in creative ways.