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Favorite scifi concept? (lemmy.ml)
submitted 1 day 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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[-] iocase@lemmy.zip 3 points 14 hours ago* (last edited 14 hours ago)

I'm boring and I really like rotating megastructures. I think what I find fascinating is they're feasible for us to make IRL if we somehow figure out refining on the moon and mass drivers (ignoring the economics too lol) since they use conventional materials even for relatively large ones.

Everyone is always focused on terraforming or colonizing distant planets. A rotating habitat is engineered to be exactly what we need better than any planet we can colonize.

Life on Mars would be demonstrably worse. You need to bury your habs under meters of regolith to not kill your colonists from radiation. Going outside is a space walk with a laundry list of items you need to attend to with little to no time to enjoy being outdoors (you're in a suit regardless which means it sucks to some extent no matter what)

A rotating Hab means you can live much closer to how you live on Earth

this post was submitted on 12 Jul 2026
87 points (96.8% liked)

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