Portrays geologist Eugene Shoemaker and explains the scientific reasoning that led him to construct his "impact theory," in which collisions with comets created

David Levy brings these "ghostly apparitions" to life. With fascinating scenarios both real and imagined, he shows how comets have wreaked their special havoc o

It was a lucky twist of fate when in the early1980s David Levy, a writer and amateur astronomer, joined up with the famous scientist Eugene Shoemaker and his wi

The perfect introduction for the novice astronomer, this book stirs the imagination and puts observation in a framework of social activity and personal adventur

David Shoemaker develops a novel pluralistic theory of responsibility, motivated by our ambivalence to cases of marginal agency--such as those caused by clinica