George Greenstein

George Greenstein is Sidney Dillon Emeritus Professor of Astronomy at Amherst College. He is the author of "Frozen Star: Of Pulsars, Black Holes, and the Nature of Stars," "The Symbiotic Universe: Life and Mind in the Cosmos," "The Quantum Challenge: Modern Research on the Foundations of Quantum Mechanics" (with Arthur Zajonc), and other books.