little more than a year ago, I participated in a meeting, organized by the National Academy of Sciences , on the subject of enhancing public understanding of science by encouraging greater collaboration between scientists and the media. Most of the scientists present were members of the academy, which serves both as an elected honor society and as an official adviser on science policy to the U.S. government. Across the room I spotted a slim man who seemed somehow familiar. His deliberate (...) movements suggested an inner passion concealed beneath a subdued exterior. When I came close enough to read his name tag, I saw that he was the famous astronomer Carl Sagan, whom I had corresponded with but never met. (shrink)