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Sci Fi Focus > Encyclopedia > Relativity > Time Dilation
Time Dilation is a consequence of Albert Einstein's Special and General Theories of *RELATIVITY*: Time passes more slowly for a clock (or person) travelling at high speed, or deep in a gravity well.
Time Dilation is a staple of science fiction: it allows a person to live far into the future and travel to the stars, without breaking the *currently known) laws of physics. Examples of stories which use Time Dilation as important plot element are Joe Haldeman's The Forever War, and Larry Niven's A World Out of Time.
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A World Out of Time
 | | By Larry Niven
Del Rey Released: 1986-03-12 Mass Market Paperback (256 pages)
Product Description: Jaybee Corbell awoke after more than 200 years as a corpsicle -- in someone else's body, and under sentence of instant annihilation if he made a wrong move while they were training him for a one-way mission to the stars.
But Corbell picked his time and made his own move. Once he was outbound, where the Society that ruled Earth could not reach him, he headed his starship toward the galactic core, where the unimaginable energies of the Universe wrenched the fabric of time and space and promised final escape from his captors.
Then he returned to an Earth eons older than the one he'd left...a planet that had had 3,000,000 years to develop perils he had never dreamed of -- perils that became nightmares that he had to escape...somehow!
List Price: $6.99 Lowest New Price: $1.95 Lowest Used Price: $0.27 Usually ships in 24 hours (As of 13:18 Pacific 20 Nov 2008 More Info)
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The Forever War
 | | By Joe Haldeman
Eos Released: 2003-09-02 Paperback (288 pages)
Product Description:
Private William Mandella is a hero in spite of himself -- a reluctant conscript drafted into an elite military unit, and propelled through space and time to fight in a distant thousand-year conflict. He never wanted to go to war, but the leaders on Earth have drawn a line in the interstellar sand -- despite the fact that their fierce alien enemy is unknowable, unconquerable, and very far away. So Mandella will perform his duties without rancor and even rise up through the military's ranks . . . if he survives. But the true test of his mettle will come when he returns to Earth. Because of the time dilation caused by space travel the loyal soldier is aging months, while his home planet is aging centuries -- and the difference will prove the saying: you never can go home. . .
List Price: $14.95 Lowest New Price: $600.00 Lowest Used Price: $12.00 (As of 13:18 Pacific 20 Nov 2008 More Info)
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Forever Free
 | | By Joe Haldeman
Ace Hardcover Released: 1999-12-06 Hardcover (277 pages)
Product Description: The brilliant sequel to The Forever War, winner of the Hugo and Nebula Awards. From Joe Haldeman, the all-time master of military science fiction, comes the new novel set in the universe of his Hugo and Nebula Award-winning classic The Forever War. An epic story about war, peace, and the price of freedom, Forever Free reintroduces readers to William Mandella--who has been living peacefully on the planet called Middle Finger, a refuge for humans who refuse to become part of the group mind known as Man. But after decades of this peace, Mandella and others are tired of living like zoo animals. So they steal a starship--and embark upon a voyage that will forever change their understanding of the universe...and themselves.
List Price: $21.95 Lowest New Price: $7.75 Lowest Used Price: $1.00 (As of 13:18 Pacific 20 Nov 2008 More Info)
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