It is heartening to see the growth of modern mathematics, especially insofar as it impacts fields that were once perceived to be rather distant. The theme of the feature articles this month is the use of mathematics to study environmental issues. Tools from statistics, modeling, partial differential equations, and other parts of our discipline come into play in delightful and surprising ways. And the mathematics really says something of substance. Even G. H. Hardy might have taken note. This issue also features a memorial to Ilya Piatetski-Shapiro, a distinguished member of the profession who is remembered by many.
--Steven G. Krantz, Editor