There are several good books about the physics of time travel,
which (surprisingly) is not forbidden by the laws of physics as
understood today. Pickover's variation on the theme is entertaining
and accessible, and chiefly distinguished by including a few short
computer programs which can be used to demonstrate some of the
things he describes. It is positively naughty of the author,
though, not to include in his references either John Gribbin's In
Search of the Edge of Time or Kip Thorne's Black Holes and Time
Warps, which cover very similar ground and which he must have read.
If you already have either of those books, you don't need this one;
if you haven't, this is as good an introduction to the subject as
they are. (Kirkus UK)
IN Time:A Traveller's Guide. CLifford A. Pickover takes readers to the forefront of science as he illuminates the most mysterious phenomenon in the universe - time itself. Is time travel possible? Is time real? Does it flow in one direction only? Does it have a beginning or an end? What is eternity? These are questions that Pickover tackles in this stimulating blend of Chopin, philosophy, Einstein and modern physics, spiced with diverting side-trips to such topics as the history of clocks, the nature of free will and the reason that gold glitters. By the time we finish this book, we understand such seemingly arcane concepts as space time diagrams, light cones, cosmic moment lines, transcendent infinite speeds, Lorentz transformations, superluminal and ultra-luminal motions, closed timelike curves, and Tipler cylinders. And most important, we will understand that time travel need not be confined to myth, science fiction, Hollywood fantasies, or scientific speculation. Time travel, we will realise, is possible.
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