I liked math - that was my favorite subject - and I was very interested in astronomy and in physical science.
I was always very interested in science, and I knew that for me, science was a better long-term career than tennis.
So I decided on science when I was in college.
The astronauts who came in with me in my astronaut class - my class had 29 men and 6 women - those men were all very used to working with women.
Different astronauts sleep in different ways.
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!
Some astronauts sleep in sort of beds - compartments that you can open up and crawl into and then close up, almost like a little bedroom.
The food isn't too bad. It's very different from the food that the astronauts ate in the very early days of the space program.
I had both male and female heroes.
The space shuttle is a better and safer rocket than it was before the Challenger accident.
No, I think most astronauts recognize that the space shuttle program is very high-risk, and are prepared for accidents.
On a standard space shuttle crew, two of the astronauts have a test pilot background - the commander and the pilot.
So most astronauts getting ready to lift off are excited and very anxious and worried about that explosion - because if something goes wrong in the first seconds of launch, there's not very much you can do.