this post was submitted on 12 Jul 2026
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Science Fiction

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Lemmy World Rules

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Favorite scifi concept? (lemmy.ml)
submitted 2 days ago by ashenone@lemmy.ml to c/sciencefiction@lemmy.world
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I'd love to hear about your favorite concept or idea you've read about or seen in scifi media.

My personal favorite is the Conjoiner Drive out of the Revelation Space series. These ship drives are dual drives on either side of a lighthugger and have a living being inside the drives to act as a supercomputer, which holds a wormhole open inside the drives. The wormhole links far in the past to the big-bang and uses the energy from the big-bang for propulsion.

In most scifi I've come across wormholes are used for FTL travel, and I thought this was such a unique and creative use of a wormhole it has stuck with me for years after reading about it.

So what are your favorite devices or ideas that have come out of scifi media?

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[–] ash@piefed.ca 3 points 1 day ago

A tardis from Dr who. It's a living spaceship + time machine.

It also has some insane features like:

  1. It's bigger on the inside. In fact it has infinite rooms and storage.

  2. It also has access to all knowledge across time.

  3. It can instantly translate all languages telepathically. So everything you hear and see will automagically be in your language.

  4. It can take any form physically. On both the inside and outside. It has a chameleon circuit which makes it blend perfectly into the surroundings.

It's said that it's destiny to be chosen by a tardis. It reads your thoughts and takes you where you want to go or where you are needed.