About the Author
Nancy Davis is an award-winning illustrator and graphic designer whose work can be seen on greeting cards and learning tools for children. She is also the illustrator of Flicker Flash (Houghton Mifflin) and A Garden of Opposites (Schwartz &Wade), which she also wrote. Nancy lives in Las Vegas, Nevada.
Karen C. Fox has been a full-time science writer for almost two decades. Covering subjects such as physics and astronomy, Karen has written for several publications, including Science Magazine, Discover, and Popular Mechanics.