Back Hold Up the Sky
Chapters (20)
  1. COVER
  2. BY CIXIN LIU
  3. TITLE PAGE
  4. COPYRIGHT
  5. COPYRIGHT ACKNOWLEDGMENTS
  6. TABLE OF CONTENTS
  7. FOREWORD
  8. THE VILLAGE TEACHER
  9. THE TIME MIGRATION
  10. 2018-04-01
  11. FIRE IN THE EARTH
  12. CONTRACTION
  13. MIRROR
  14. ODE TO JOY
  15. FULL-SPECTRUM BARRAGE JAMMING
  16. SEA OF DREAMS
  17. CLOUD OF POEMS
  18. THE THINKER
  19. ABOUT THE AUTHOR
  20. AN INVITATION FROM THE PUBLISHER

“It’s beautiful, indeed, but this universe goes against the basic laws of physics,” the Senior Official said, looking at the screen. “Never mind an ocean forty billion light-years deep, a body of liquid four light-years deep would have collapsed into a black hole due to gravity long ago.”

Bai Bing shook his head. “You’ve forgotten a fundamental point: This isn’t our universe. This universe has its own set of laws of physics, completely different from ours. In this universe, the gravitational constant, Planck’s constant, the speed of light, and other basic physical constants are all different. In this universe, one plus one might not even equal two.”

Encouraged by the Senior Official, Bai Bing continued the demonstration, creating a third universe. When they entered for a closer look, a chaotic jumble of colors and shapes appeared on the screen. Bai Bing immediately exited. “This is a six-dimensional universe, so we have no way of observing it. In fact, this is the most common case, and we were lucky to get two three-dimensional universes on our first two tries. Once the universe cools down from its high-energy state, the odds of having three available dimensions on the macroscopic scale is only three out of eleven.”

A fourth universe manifested. To the bafflement of everyone: the universe appeared as an endless black plane, with countless bright, silvery lines intersecting it perpendicularly. After reading the analysis profile, Bai Bing said, “This universe is the opposite of the previous one—it has fewer dimensions than our own. This is a two-and-a-half-dimensional universe.”

“Two and a half dimensions?” The Senior Official was astonished.

“See, the black two-dimensional plane with no thickness is this universe’s outer space. Its diameter is around five hundred billion light-years. The bright lines perpendicular to the plane are the stars in space. They’re hundreds of millions of light-years long, but infinitely thin, because they’re one-dimensional. Universes with fractional dimensions are rare. I’m going to make note of the parameters that produced this one.”

“A question,” said the Senior Official. “If you use these parameters to initialize a second big bang, would it produce a universe exactly the same as this one?”

“Yes, and the evolution process would be identical too. Everything was predetermined at the time of the big bang. See, after physics got past the obfuscation of quantum effects, the universe once again displayed an inherently causal and deterministic nature.” Bai Bing looked at the others one by one. He said seriously, “Please keep this point in mind. This will be key to understanding the terrifying things we’ll be seeing later.”

“This really is fascinating.” The Senior Official sighed. “Playing God, aloof and ethereal. It’s been a long time since I’ve felt this way.”