H. G. Wells’s seminal short story The Time Machine, published in 1895, provided the springboard for modern science fiction’s time travel explosion. Responding to their own fascination with the subject, the greatest visionary writers of the twentieth century penned some of their finest stories. Here are eighteen of the most exciting tales ever told, including

Time’s Arrow In Arthur C. Clarke’s classic, two brilliant physicists finally crack the mystery of time travel—with appalling consequences.

Death Ship Richard Matheson, author of Somewhere in Time, unveils a chilling scenario concerning three astronauts who stumble upon the conundrum of past and future.

A Sound of Thunder Ray Bradbury’s haunting vision of modern man gone dinosaur hunting poses daunting questions about destiny and consequences.

Yesterday was Monday If all the world’s a stage, Theodore Sturgeon’s compelling tale follows the odyssey of an ordinary joe who winds up backstage.

Rainbird R.A. Lafferty reflects on what might have been in this brainteaser about an inventor so brilliant that he invents himself right out of existence.

Timetipping What if everyone time-traveled except you? Jack Dann provides some surprising answers in this literary gem.

…as well as stories by Poul Anderson, L. Sprague de Camp, Jack Finney, Joe Haldeman, John Kessel, Nancy Kress, Henry Kuttner, Ursula K. Le Guin, Larry Niven, Charles Sheffield, Robert Silverberg, Connie Willis