Genus Homo
P. Schuyler Miller
 A bus is trapped in the cave-in of a tunnel, and its passengers are preserved for millennia in a state of suspended animation. When their vehicle is ultimately uncovered they awaken to a future in which humankind has vanished from the face of the earth, and gorillas have evolved to intelligence and become the dominant species. The preserved humans must now adjust to a world in which they have become obsolete.