Papers from a symposium on the endangered Mt. Graham red squirrel, called in response to the building of an observatory on the mountain by the University of Arizona, offers a comprehensive picture of the ecological conditions and the impacts of natural and man-mad changes on the squirrel and its mountain home.

A public controversy over plans for construction of an astrophysical observatory in the Pinaleno Mountains of southeastern Arizona swelled during 1987 and 1988. For several years the controversy attracted national attention, then for a while the interest of the press and scientific journals waned, only to revive again recently.