Rick Smolan

A lot of people don't want to know, but I'd like to know if I have a 10 percent or a 90 percent chance of developing Alzheimer's some day. If I know I'm likely to develop it, I'm certainly going to start looking around right now to find if there is something that I can do to offset it.

When I start getting embroiled in heated debates and feeling stressed, I just turn everything off and disconnect from the world. I simply tell my colleagues and friends that I am not well and need to cancel all meetings for a day or more. I take it easy - go for a long hike, take a vacation somewhere, or just stay at home and read.

The jet stream is a very strong force and pushing a balloon into it is like pushing up against a brick wall, but once we got into it, we found that, remarkably, the balloon went whatever speed the wind went.