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Time is a “thing” that cannot be grasped yet which undoubtedly exists. A “thing” which everybody speaks of but no one has seen. We see, hear, feel, taste in time, but not time itself. We are sure we are grounded in physical reality, but it is Chronos—the Greek god of time, said to have ruled the world before Zeus—whose strange principles shape our existence. To confront time, we must approach it carefully, “peeling away” its mysteries one by one, distinguishing it from its various side-effects: duration, memory, movement, Speed, repetition. ... Clocks do not necessarily measure time, for time continues even when we think it is running out. Because time may carry us along in its flow, but it is a constant. It exists independently of we who observe it, who live through it, who grow old and die in it.
Today, the boldest look at time, and perhaps the most disconcerting, is provided by physicists. Scientists from Galileo to Einstein, and now in the era of antimatter and superstrings, wrestle with the mind-blowing questions which time raises: Did time precede the universe? How did it start? Can we reverse its flow? Do several “times” exist in time?
A physicist at the French atomic energy commission and a professor of physics and the philosophy of science at the Ecole Centrale de Paris, ETIENNE KLEIN is one of the world’s foremost specialists on the question of time and physics. He is the winner of the 2004 Prix Jean Rostand, a prize given in honor of the great biologist and writer, and the author of numerous books popularizing science.
Translated by GLENN BURNEY. an American professor at the prestigious Ecole de Sciences Politiques.
Introduction
Does a Clock Speak for Itself?
The Word “Time” or, Every Dictionary’s Embarrassment
An Unnaturally Flowing River
The Time Before Chronos
The Stopping of Time or, The Abolition of the World
Not Everything Passes with Time
Boredom or, Time Exposed
What Makes Time Pass?
Eternal Recurrence or, The Circle’s Vices
Causality or, The Impossible Tick-Tock
“Time Travels” and Other Uchronias
Antimatter or, The End of the Trip
1905: Now’ Says Good-bye to the Universe
Does the Future Already Exist in the Future?
Is Time an Opportunist?
The Kaons Gang Turns Time Upside Down
2002: Does Cosmic Time Accelerate?
Some Time. . . . Only from Time to Time?
Dance of the Superstrings and the Several-Steps Waltz
Theories Seeking Origin of Time, Desperately
Chronoclastic Spirit, Useful Watch
Endless Unfurling of the Present Instant
The Unconscious or, Time without Flow
The Physicist, the Romantic, and the Jealous Type or, The Dramas of Impossession
Has Physics Forgotten Death?
Notes