IT IS a remarkable fact that time travel is not obviously ruled out by the known laws of physics. In fact, they appear to provide numerous avenues for cheating time.
All are described here in fascinating detail by David Toomey. From Einstein鈥檚 general theory of relativity to wormholes and closed time-like curves, this is an entertaining and authoritative survey of a mind-blowing, scarcely believable field, and the story of the theoretical physicists at the forefront of its study. It鈥檚 proof, if proof be needed, that science is far stranger than science fiction.
The New Time Travelers
W. W. Norton