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Q&A

General Q&A about worldbuilding and other speculative developments that can be extrapolated from science.

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How can my large, urban trophy float?

The city - a modern, sterile 'utopia' (with the undercurrents of government control and suppression, of course), that can be current tech, or future tech so long as the day-to-day lives are in curr...

1 answer  ·  posted 9y ago by Mikey‭  ·  last activity 9y ago by Mikey‭

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A World Without Mathematics

What significant technologies would be lost in a world without "Advanced" Mathematics? Specifically, what technologies required to get to the next level of scientific progress in an area would be l...

10 answers  ·  posted 10y ago by Black‭  ·  last activity 9y ago by Black‭

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Sol economy: What is optimal for production on earth?

Follow-up-question to this scenario: ~ 2750 A.D : Quite a few asteroids/celestial bodies have been move to a stable earth orbit and are beeing mined for ressources. I am currently designing the eco...

3 answers  ·  posted 9y ago by System‭  ·  last activity 9y ago by System‭

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Can we create an Earth-like planet from Oort cloud?

Say a technological advanced civilization wants to create an Earth-like planet using materials from the Oort cloud. Could they really be able to create a habitable world resembling Earth using ju...

2 answers  ·  posted 9y ago by user6760‭  ·  last activity 9y ago by user6760‭

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How realistic is the power generation depicted in The Legend of Korra?

Early on in the cartoon The Legend of Korra, we're shown one of the main characters working at his job. He works in a power plant, where he and his coworkers spend all day using Bending (essentiall...

2 answers  ·  posted 9y ago by Mason Wheeler‭  ·  last activity 9y ago by Mason Wheeler‭

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Small universe - is there any point in interstellar communication?

Everything on Earth and in the Solar system is as we know it. However it is discovered that we live in a small but unbounded universe. That is to say if we travel far enough in a straight line we w...

4 answers  ·  posted 9y ago by chasly from UK‭  ·  last activity 9y ago by chasly from UK‭

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Efficient sublight propulsion (for "dogfighting")

Researching efficient methods of no-FTL methods often turns up engine solutions that are efficient in the sense that they have a higher specific impulse, but most such solutions seem to have a comp...

5 answers  ·  posted 9y ago by Llama_guy‭  ·  last activity 9y ago by Llama_guy‭

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Can a human-sized organism survive eating only textile fibers?

Since there are living beings (like moth larvae) which feed on textile fibers (wool, cotton, silk, et cetera), I was planning to introduce a human-sized creature with such feature, plus the ability...

1 answer  ·  posted 9y ago by Andrea Jens‭  ·  last activity 9y ago by Andrea Jens‭

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What technical expertise would be required to create a sustainable colony?

A ship is sent through a wormhole to an unknown planet to create a sustainable colony. The colonists know that they won't have further contact with their home planet - this is a last ditch effort t...

6 answers  ·  posted 9y ago by CoolCurry‭  ·  last activity 9y ago by CoolCurry‭

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Could you create a travelling planet?

Assuming fission thrusters as described here: Would a nuclear fission thruster with continuous fuel injection be possible?, and assuming drilling for the planet's molten mettle core as discussed he...

4 answers  ·  posted 9y ago by Lorry Laurence mcLarry‭  ·  last activity 9y ago by Lorry Laurence mcLarry‭

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What would be the consequences of detonating all nuclear weapons on the edge of space?

In today's Dr McNinja, the Vice President of the US (who is also a wizard) detonated all of Russia's nuclear weapons on the edge of space at once: Copyright belongs to Christopher Hastings, 2015....

2 answers  ·  posted 9y ago by Nzall‭  ·  last activity 9y ago by Nzall‭

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Safety Margin for a Artificial Orbital Habitat

I'm always interested in the possibilities of human creating an orbiting space habitat like Stanford Torus or O'neill Cylinder. Those habitats were designed to support certain numbers of colonists....

4 answers  ·  posted 9y ago by Satori Wita‭  ·  last activity 9y ago by Satori Wita‭

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Hive mind withdrawal and communication skills

Centuries ago, humanity have been incorporated into an alien hive mind, spread by a bacterial-like infection. The "bacteria" infects the blood and brain and allows the infected to join their minds ...

1 answer  ·  posted 9y ago by Babika Babaka‭  ·  last activity 9y ago by Babika Babaka‭

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Making people accept their new robot overlord

So, it's happened. We have a robot overlord who follows the 3 Laws of Robotics + the Zeroth Law of Robotics. How we got such a thing or the process by which it makes its decisions is outside this...

12 answers  ·  posted 9y ago by Green‭  ·  last activity 9y ago by Green‭

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Mirrored twins that aren't identical?

If a pair of twins developed when their mother's egg split in half and they were fertilized by different sperm, could one of them develop situs inversus? The child with the condition would be male,...

2 answers  ·  posted 9y ago by jeln‭  ·  last activity 9y ago by jeln‭

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Can a planet with a dead core still generate a strong magnetic field?

Imagine a world with a dead core, like Mars, but covered in water. This world has managed to hold on to its atmosphere and quite a bit of its water as well. I'm sure the prodigious life there would...

3 answers  ·  posted 9y ago by Josh Belmont‭  ·  last activity 9y ago by Josh Belmont‭

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What are the limitations of apple-based weapons and construction?

In short : how far can you technologically go, (mainly concerning building and weapon) having only an unlimited amount of apple? details : About apples : 1) You have an infinite supply of app...

6 answers  ·  posted 9y ago by Ether Frog‭  ·  last activity 9y ago by Ether Frog‭

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Could aliens see in other wavelengths?

This question has two parts: Could biological processes create an organism than can see in wavelengths outside the human-visible spectrum? ("Outside" meaning some significant amount outside. Ther...

9 answers  ·  posted 9y ago by ItsTimmy‭  ·  last activity 9y ago by ItsTimmy‭

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Radiation sudden stop

It is not hard sci fi, but I need something plausible. A spaceship falls on a planet and destroys itself. The area surrounding the wreck becomes highly radioactive. It can be because of the leak...

6 answers  ·  posted 9y ago by nekron‭  ·  last activity 9y ago by nekron‭

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Would wing suits be an effective mode of transportation for halflings?

Let's assume that a halfling is of similar build, but half the height of an adult human. If I strap a wing suit onto one, I should have a quarter the surface area, but one eight the weight of an ad...

2 answers  ·  posted 9y ago by ckersch‭  ·  last activity 9y ago by ckersch‭

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What natural defenses might an ecosystem evolve against dragons?

In a world in which dragons (as animals, minus magical associations) existed, what natural defense mechanisms might other animals or plants evolve in response? How would a creature as devastating ...

4 answers  ·  posted 9y ago by Nerrolken‭  ·  last activity 9y ago by Nerrolken‭

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Consequences or Benefits of a Binary Planet?

I'm curious to the affect a planet would have if it orbited around, or was orbited by another planet of equal, slightly larger mass. Say if Earth had, not the moon, but a planetary object the same ...

1 answer  ·  posted 9y ago by user11527‭  ·  last activity 9y ago by user11527‭

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Brick and Mortar in Space

If there's one thing that solid celestial bodies have, it's dust. Dust plus water is mud. Mud plus heat is brick (and recoverable water vapor). The heat can come from a reflective solar array. Easy...

1 answer  ·  posted 9y ago by master_gibber‭

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Creating a species with birdlike bone structure

I'm working on creating a race of humanoids with "hollow" bones like birds (they have criss-crossing struts for internal support). They are short - an individual is unlikely to top five feet. Woul...

1 answer  ·  posted 10y ago by CoolCurry‭  ·  last activity 9y ago by CoolCurry‭

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What pressures could drive evolution of a floating creature?

What environmental pressures could drive evolution of a creature that has the ability to float? How it floats isn't important.

4 answers  ·  posted 9y ago by Oliver Marks‭  ·  last activity 9y ago by Oliver Marks‭

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How long will it take to restore genetic diversity if it is reduced drastically in a human population?

I read in this question that the minimum viable population without causing large problems in genetic diversity is about 50. If we have a larger population (say a hundred) and genetic diversity beco...

4 answers  ·  posted 9y ago by JDSweetBeat‭  ·  last activity 9y ago by JDSweetBeat‭

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What would the climate be like on an earth-like planet with only one convection cell per hemisphere?

Earth has three convection cells per hemisphere. These are the Polar cell, Ferrel cell and Hadley cell. These create the trade winds, westerlies and polar easterlies which control many aspects of c...

1 answer  ·  posted 9y ago by FihanoLeSugg‭  ·  last activity 9y ago by FihanoLeSugg‭

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Are there any side effects if genomic imprinting no longer exists?

I'm trying to make a world that human sex ratio is 2:8 (male:female). Most of the females are homosexual, and male is not necessary for reproduction. I thought it was easy at first, just say that t...

2 answers  ·  posted 9y ago by fairytale‭  ·  last activity 9y ago by fairytale‭

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Viability of an amalgam tree

I recently learned of a fascinating art project being developed by Sam van Aken involving the grafting of flower buds onto a stock tree. You can find out more about the project itself by visiting t...

5 answers  ·  posted 9y ago by Frostfyre‭  ·  last activity 9y ago by Frostfyre‭

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What is the maxiumum depth for an Earth like atmosphere?

I am sure most of you have seen Star Wars. In Episode IV: The Empire Strikes Back our heroes travel to Bespin, a gas planet with a habitable zone to refuel at the floating cloud city. Well of cou...

1 answer  ·  posted 9y ago by Josh Belmont‭  ·  last activity 9y ago by Josh Belmont‭

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What is a realistic plague that could have wiped out the population of an island?

Running a Steampunk campaign with some friends. The idea is that a massive a destructive plague wiped out the population of an island that was really technologically advanced. The plague needs to s...

1 answer  ·  posted 9y ago by Mr. Universe‭  ·  last activity 9y ago by Mr. Universe‭

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World destruction - continued existence of separate biomes possible?

If a world containing various biomes (frozen tundra, plains, volcanic etc), was destroyed by an asteroid or series of natural disasters, would the huge chunks of the world be able continue supporti...

5 answers  ·  posted 9y ago by Redpaw101‭  ·  last activity 9y ago by Redpaw101‭

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How can I brighten the night sky (just a bit)?

Okay so we have the case: My world is Earth-like(Spherical) Slight fantasy, but also some science It has a normal day-night cycle and seasons I need for a particular area to make the sky somewh...

16 answers  ·  posted 10y ago by MikhailTal‭  ·  last activity 9y ago by MikhailTal‭

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What would've happened if we used Europa's water to integrate into Mars atmosphere?

Lets assume we as humankind can, not only wormhole the spacecraft, but planets and moons. So, what would've happened to Mars if we pulled icy Europa closer to the sun, we might use our flaming star...

2 answers  ·  posted 9y ago by undulationer‭  ·  last activity 9y ago by undulationer‭

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The Winter of a Hundred Years

Back home, one ice age during the two and a half million years of the Pleistocene lasted a total of 100,000 years, ninety thousand of intense cold followed by ten thousand of milder interglacial we...

1 answer  ·  posted 9y ago by JohnWDailey‭  ·  last activity 9y ago by JohnWDailey‭

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Ocean and air currents on a water planet

I just stumbled across this website the other day, and this is my first time posting, so apologies if the question is too vague or improperly worded. I am trying to build an all ocean world. I'm ...

3 answers  ·  posted 9y ago by Cascadiahawk‭  ·  last activity 9y ago by Cascadiahawk‭

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The shortest possible distance between a boreal area and a hot desert?

Let's assume a planet like ours, same size and same conditions. My characters live at approximately 60° North, in a boreal forest, with a climate much like the Nordic countries in Europe. They are...

5 answers  ·  posted 10y ago by Niffler‭  ·  last activity 9y ago by Niffler‭

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Calories production in plants per year

I am trying to estimate how much calories is available in form of plants to mammal herbivores per square meter per year in optimal conditions. By optimal conditions I mean that the climate is tempe...

1 answer  ·  posted 9y ago by Irigi‭  ·  last activity 9y ago by Irigi‭

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Magnetic Celestial Bodies in Orbit

What would be the effect of large magnetic celestial bodies orbiting each other? Could a star have enough metallic content to become magnetic? What would the effect be on magnetic planets in orbi...

2 answers  ·  posted 9y ago by Varrick‭  ·  last activity 9y ago by Varrick‭

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Asia vs. the Americas

For 10,000 years since Beringia, the bridge connecting Asia to North America, had vanished, the Asian and Native American races show great distinction. But if Beringia has persisted to this day, c...

2 answers  ·  posted 9y ago by JohnWDailey‭  ·  last activity 9y ago by JohnWDailey‭

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Lifespan with unaging sleep?

As the question title suggests, I'm looking to find out how long a human could live for if they didn't age in their sleep. Assume that this ability kicks in at about the age of 16 and they have com...

1 answer  ·  posted 9y ago by Titanide‭  ·  last activity 9y ago by Titanide‭

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How will base-10 work in a world where duodecimals have never been thought of?

In a world where duodecimals (base 12) have never been invented or thought of, how will decimals replace them? We now know that we owe everything related to duodecimals to the ancient Egyptians an...

2 answers  ·  posted 9y ago by Ifree Contractors‭  ·  last activity 9y ago by Ifree Contractors‭

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Could polar areas be habitable?

What could make polar areas of an earth-like planet habitable (non desert) and what side effect would it cause (i.e. how such planet would differ to contemporary earth)?

3 answers  ·  posted 9y ago by jaboja‭  ·  last activity 9y ago by jaboja‭

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Orbit of a double planet

In a system where 2 planets of similar mass are orbiting around a common barycenter, would the following configuration considered stable on the long run? They orbit at 1,6 AU from their star The ...

1 answer  ·  posted 9y ago by Vincent‭  ·  last activity 9y ago by Vincent‭

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A city of Sand...stone

Picture this...the sun sets over an orangish red desert, in the distance you see a town rising from three hills, a river snaking between them. The buildings rise from the hills and spread between ...

4 answers  ·  posted 9y ago by James‭  ·  last activity 9y ago by James‭

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In a world where the Earth is cooling down instead of heating up, would governments push for increased emissions?

We are living on a planet where governments are constantly trying to reduce the amount of pollution and emissions in a bid to slow down (or reverse) global warming. But imagine a world where the Ea...

2 answers  ·  posted 9y ago by JonathanReez‭  ·  last activity 9y ago by JonathanReez‭

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What if the speed of light were 100 times higher?

Imagine the speed of light is 100 times that in our universe. Light from the moon takes about 1/100th of a second, the sunlight reaches our eyes in about 4 seconds, from nearby Alpha Centauri in ab...

7 answers  ·  posted 10y ago by Serban Tanasa‭  ·  last activity 9y ago by Serban Tanasa‭

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What characteristics would a telepathic, energy-absorbing race of aliens have?

A race of aliens exists on a distant planet whose biological functioning depends on absorbing a specific type of energy. They have what is essentially an antenna through which they passively absorb...

1 answer  ·  posted 9y ago by Josh‭  ·  last activity 9y ago by Josh‭

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Could a giant spacestation stay in orbit for 1000 years?

This is an extension of my first question, and precisely as Jim2B suggests, I want enough time to pass on my network of space stations for their inhabitants to forget why they're there, how they go...

1 answer  ·  posted 9y ago by lowercasename‭  ·  last activity 9y ago by lowercasename‭

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A Completely Different Kind of Reef

In this scenario, corals, sponges and bryozoans have been extinct for 65 million years. In their place as reefbuilders are echinoderms, bivalves, barnacles and worms of the infraclass canalipalpat...

3 answers  ·  posted 9y ago by JohnWDailey‭  ·  last activity 9y ago by JohnWDailey‭