I had both male and female heroes.

Three Secrets to Success: Be willing to learn new things. Be able to assimilate new information quickly. Be able to get along with and work with other people.

You can picture pretty easily if there were a paying passenger aboard a rocket that failed, like Challenger failed. Certainly it would be a tragedy, and a tragedy for the company. They would have a hard time recovering from it.

We can see cities during the day and at night, and we can watch rivers dump sediment into the ocean, and see hurricanes form.

So I decided on science when I was in college.

I can't remember a single time [my parents] ever told me not to do something I wanted to do.

It's easy to sleep floating around - it's very comfortable. But you have to be careful that you don't float into somebody or something!