Greg Egan is one of the most eminent contemporary authors in the genre of “hard” science fiction. By “hard”, one means not that it is necessarily difficult to read, but that the author has taken care to either follow the laws of known science or, if the story involves alternative laws (for example, a faster than light drive, anti-gravity, or time travel) to define those laws and then remain completely consistent with them. This needn’t involve tedious lectures—masters of science fiction, like Greg Egan, “show, don’t tell”—but the reader should be able to figure out the rules and the characters be constrained by them as the story unfolds. Egan is also a skilled practitioner of “world building” which takes hard science fiction to the next level by constructing entire worlds or universes in which an alternative set of conditions are worked out in a logical and consistent way.
Whenever a new large particle collider is proposed, fear-mongers prattle on about the risk of its unleashing some new physical phenomenon which might destroy the Earth or, for those who think big, the universe by, for example, causing it to collapse into a black hole or causing the quantum vacuum to tunnel to a lower energy state where the laws of physics are incompatible with the existence of condensed matter and life. This is, of course, completely absurd. We have observed cosmic rays, for example the Oh-My-God particle detected by an instrument in Utah in 1991, with energies more than twenty million times greater than those produced by the Large Hadron Collider, the most powerful particle accelerator in existence today. These natural cosmic rays strike the Earth, the Moon, the Sun, and everything else in the universe all the time and have been doing so for billions of years and, if you look around, you’ll see that the universe is still here. If a high energy particle was going to destroy it, it would have been gone long ago.... [Read More]