Showerthoughts

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A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. The best ones are thoughts that many people can relate to and they find something funny or interesting in regular stuff.

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The reason why we never meet time travelers is because our civilization ends before the technology can come to fruition. (lemmy.world)

submitted 7 months ago by [email protected] to c/[email protected]

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Sort of similar to the Great Filter theory, but applied to time travel technology.

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[–] [email protected] 2 points 7 months ago

There's a hard sci-fi novel (1970s or 1980s) called "Tau Zero" that features this idea.

Book summary (spoils all of it)

A colony ship with a Bussard Ramjet on each end (debunked theoretical spaceship drive that uses interstellar hydrogen for propulsion, i.e. the faster you go, the more medium you hit and the harder you accelerate) suffers an accident that destroys the deceleration engine. They keep accelerating because they need the engine's magnetic field to protect them from interstellar dust. First they try reach the void between galaxies to safely repair the ship, when the interstellar medium is still too "dense," they go for the void between galaxy clusters, then superclusters, then they just stay on the throttle until the big crunch, at which point, in the nothingness after the universe collapsed in on itself, they can finally fix their ship and begin decelerating into the bounce-back big bang of the forming next universe and colonize a planet.