Questions tagged [time-travel]
For questions relating to travel in time. Such travel may involve FTL travel; consider also using the [faster-than-light] tag.
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Pros and cons of introducing modified Hangul(Korean Alphabet) to people of another Time-Space(who don't have their own script) over English alphabet
For those who don't know Hangul was created by King Sejong(There is a Civ Game song) as an alternative and easy to use script for Korean to replace Chinese characters(Hanji) which are really difficult ...
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Kill your grandfather paradox(time travel) [closed]
Suppose you have a time travel device and by time traveling into the past you alter the events of the life of a ancestors of yours so you are never born.The paradox is since you are never born ,you ...
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How can historians go to the past without changing it?
A future where the history books have been so revised/burnt/redacted- whatever, that to gain an accurate and objective picture of the past it's necessary to actually send someone back in time to see ...
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Preventing Timeline Stagnation in a World with Widespread Time Manipulation
In my universe, characters gain time manipulation abilities (if they wanted to) starting at level 60, enabling them to travel 100–500 years into the past or future. Higher levels increase this range (...
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Would anyone use time travel if Earths motion left you behind in space? [closed]
The year is 2307. We have spaceships that travel at 0.1 c. Time travel has finally, finally been invented. It takes a lot of power to send someone back in time, but it’s possible. The problem is, the ...
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Old hardware, state-of-the-art software development [closed]
16-bit Lessons Learned
For whatever reason we must deal with 16-bit hardware. Think: 80286. Think: 1990.
But we are in 2025 (and people who worked even with 8-bit chips are still alive, we can still ...
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A new cradle: The best place to kickstart civilization
In this world, a group of experts from our world were thrown to the past by unknown forces. Exactly 12,000 years back. To go back to our world, they need to kickstart the industrial revolution as soon ...
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A disguised ship with modern tech in the Age of Sail [duplicate]
Premise: a large group of people with a technological base equivalent to modern times appears on an isolated island in the Indian Ocean around 1750 or so. The aliens/gods/whoever responsible for this ...
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how to harvest enough penicillin in 1346? [duplicate]
Background
I got sent back in time to 1346, England completely naked from head to toe. I am commissioned by a powerful organization to prevent the black death that wiped out most of the population, my ...
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How to reconcile the effect of my time magic spell with my timeline
Magic is able to achieve its mystical effects through its Pleroma. Basically, Pleromas are magical and non-physical locations and objects that serve as the sources of power for magic. Each Pleroma is ...
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Causal Reconciliation: Is this a viable way for my FTL system to preserve the course of History?
This was kind of inspired by Singularity Sky, as well as Halo for having the concept of 'causal reconciliation' even if it's just a throw away handwave with little elaboration.
The premise is this, ...
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Resources for developing a time travel system [closed]
I hope this is the correct forum for this question. I'm in the early stages of worldbuilding for a time travel story I want to tell. To be clear, I am not asking for time travel mechanisms. Instead, I'...
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Why doesn't the world fill with time travelers?
Far into the future, time travel is invented. Unfortunately, this is about 10 minutes before the universe is supposed to end, so everyone promptly gets into the time capsule and heads back to some ...
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Can the plasma jet emitted from a supermassive black hole form a naturally-occurring Tipler cylinder?
I want to preface the question with 'obviously, it's not a real Tipler cylinder, being finite in some -t direction before the black hole formed.'
A Tipler cylinder is defined as some rotating mass of ...
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What can a time traveler use to generate an encryption key to encrypt information so it's only decryptable after a given time period
I have a time traveler basically dropping a few computers with a sort of technological uplift program into the 1980s. These computers have information about future science and technology, along with ...
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