JEFF HAWKINS is one of the most successful and highly regarded computer architects and entrepreneurs in Silicon Valley. Currently the chief technology officer at palmOne, he founded Palm Computing and Handspring and created the Redwood Neuroscience Institute to promote research on memory and cognition. He is a member of the National Academy of Engineering and serves on the scientific board of Cold Spring Harbor Laboratory. He lives in northern California.

SANDRA BLAKESLEE has been writing about science and medicine for the New York Times for over thirty years and is the coauthor of Phantoms in the Brain by V. S. Ramachandran and of Judith Wallerstein’s bestselling books on psychology and marriage. She lives in Santa Fe, New Mexico.