Unusual technologies

We usually talk about common mainstream technology concepts, such as laser beams, warp drives, etc. But how about tech concepts that do not exist yet, and would theoretically be possible? Tell your ideas!

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I was thinking of a great machine capable of creating a separate Universe alongside with a portal leading to it. It would be useful if the Universe would ever come to an end.
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How about the antiverse. It is a real theoretical concept (there are proofs for it). The antiverse is like our universe, but time is reversed and matter is exotic antimatter. If we had access to it somehow, we could perhaps use it to create anti-gravity and even an Alcubierre drive. The problem is that we would need to create an Einstein-Rosen Bridge, which requires exotic [anti]matter (i.e., exotic [anti]matter requires exotic [anti]matter).

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What about a machine that absorbs dark matter and converts it into energy?

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Wouldn’t entering the anti verse destroy you? I mean, if I remember correctly, if antimatter and matter meet each other, they cancel each other out and disappear, right?

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@OmnipotentFNarr Well, your ship could use magnetic technology around the ship, making us safe. That already exists, and it is used to stock antihydrogen atoms.
@The_Void It depends on how much energy dark matter produces. However, we do not know what dark matter is, yet, so we can not figure it out.

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I’ve got an idea! how about a machine that changes the gravity of a certain place?

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That machine would need to be able to create paragravity and anti-gravity. Anti-gravity can be formed using exotic matter or Casimir vacuum. Paragravity could destroy spacetime, perhaps. That would be similar to “gravity”, because it would attract stuff.

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Artificial gravity would make Alcubierre drives possible. That would have major impacts in society if it already controls some dozens of stars. Incredibly fast expansion would start.

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How about unusual FTL methods? We usually hear about the Alcubierre drive, wormholes, etc, but what are some unusual FTL methods ideas?

Perhaps dimensional-hopping? Or is that just wormholes?

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I think it would depend on what kind of artificial gravity. Artificial gravity could very well be generated by centrifugation.
Also, try not to double post (even though, I’m not the best person to say that). Edit your post instead. If your post was the last one and if you edit it, the thread will appear in the list of recent threads on the forum main page.
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Centrifugal force is not gravity though. Sure, it has the same effects in day-to-day life, but it is still a totally different phenomenon. Also, it only works in space, where there is no conflict with mobility and gravity. (For example, you can’t exactly build a working one here on Earth to simulate zero-G, since in half a rotation Earth’s gravity will be on the other side.

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