Communication problems between science and the courts are widely deplored and sometimes exploited by a variety of groups. The U.S. Supreme Court has twice tightened the law of evidence to control the flow of information, but amazingly little has been written to analyze the nature of the problem and reduce the barriers. Expert Witnesses: Explaining and Understanding Science results from the first-hand experience of the contributors-who include scientists, expert witnesses, litigators, and a judge-that the cultural and interdisciplinary communications barriers between science and the law can be greatly reduced to everybody's advantage if the parties understand and respect each other's needs and positions.