Challenge accepted... James Blish, A Clash of Cymbals (published in the U.S. as The Triumph of Time) (1959), part of the Cities in Flight sequence of novels and novelettes.RockDoctor wrote: ↑Sat Mar 23, 2024 6:13 pmI'm going to dial it up a notch - mere nukes are now off the table. (Which also takes one of the minor characters in Banks' "Consider Phlebas" off the table). It's continent-buster and upwards now, which mean really big nukes (say, a gigatonne TNT equivalent and upwards ; I make that 4.20*10^18 J in real money). Or a "Total Conversion" bomb of 47g or more (if my abacus hasn't slipped a decimal place). Feel free to continue in an upwards direction.
Does "spectacular" imply high energies? I guess not. But biological suicides that combine certainty and spectacle are going to challenge. Oh no, I've got a couple, so I'm sure someone has come up with some that fit.
Evidence of a collision between two universes is detected — a matter-antimatter collision that reveals the cyclic nature of reality. This phenomenon, which will shortly accelerate to engulf all galactic space; in other words, the colliding universes will end in a transition from the Big Bang to the Big Crunch.
Mayor Amalfi of the spacegoing city New York sets up a project for several volunteers to leapfrog the transition and emerge in the new universe created by the catastrophe, and set things going again so that it expands rather than staying small and stable as various aliens want - they'll die doing it, but everyone else has died anyway. When this occurs he knows that everyone involved will probably follow instructions and release gases etc. from their suits slowly, to give the universe a steady start to the expansion; Amalfi decides that he'll literally go out with a bang, and triggers explosive destruction of his suit which causes the Big Bang...
https://en.wikipedia.org/wiki/Cities_in ... ph_of_Time