Introduction by Robert Silverberg
Nelson Bond, "And Lo! The Bird"
R. A. Lafferty, "Narrow Valley"
H. G. Wells, "The Empire of the Ants"
Brian W. Aldiss, "The Night That All Time Broke Out"
Raymond Z. Gallun, "Davey Jones' Ambassador"
Harry Harrison, "Rock Diver"
Avram Davidson, "Or All the Seas with Oysters"
P. Schuyler Miller, "The Chrysalis"
Robert Abernathy, "The Rotifers"
Robert Silverberg, "When We Went to See the End of the World"