Preface
ix
Acknowledgments
xix
Port I: Class I Impossibilities
1 : Force Fields
3
2: Invisibility
16
3: Phasers and Death Stars
34
4: Teleportation
53
5: Telepathy
70
6: Psychokinesis
88
7: Robots
103
8: Extraterrestrials and UFOs
126
9: Starships
154
10: Antimatter and Anti-universes
179
Port II: Class II Impossibilities
11 : Faster Than Light
197
12: Time Travel
216
13: Parallel Universes
229
Port III: Class III Impossibilities
14: Perpetual Motion Machines
257
15: Precognition
272
Epilogue: The Future of the Impossible
284
Notes
305
Bibliography
317
Index
319