
In the geological record, there are five major mass extinctions the "Big Five." The most famous happened at the end of the Cretaceous Period, when the dinosaurs and two-thirds of all marine animal species were wiped out, opening the door for the age of mammals and the rise...

Mark Irwin's boyhood near the nuclear laboratory in Oak Ridge, Tennessee, haunts his poetry. This book of three elegies explores the nature of remembered time and space--personal, historical, geological--against the progression of time--evolution, germination, cell division,...
