An atomic nucleus can be considered a set of two‐nucleon systems. What are the forces between these pairs? How do protons and neutrons differ and how are they similar? Studies during the past three decades have given some answers and indicated which new kinds of experiments are likely to be most useful.
How do you cope with the ever‐increasing flood of literature? A new computer‐assisted system will offer new and better ways of obtaining physics information. We seek your opinions.
Not so fast! say critics of the May article in which Bilaniuk and Sudarshan offered the arguments for faster-than-light particles. Their letters raise questions about causality and interactions. The original authors contribute a reply.