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Q&A Where would a dense population of human beings live underground?

By that, I don't mean what type of structures, I mean under which part of the Earth? It's an extremely densely populated nation. As densely populated as many major cities - think Hong Kong and more...

3 answers  ·  posted 6y ago by nondelicate‭  ·  last activity 6y ago by nondelicate‭

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Q&A Can capybaras spread to Louisiana from Venezuela and populate it in less than 1000 years?

Some hundreds of years ago, all humanity was removed from the Americas. In fact, most humans are gone from the world altogether. In the intervening time, nature has overrun the formerly human domin...

7 answers  ·  posted 6y ago by kingledion‭  ·  last activity 6y ago by kingledion‭

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Q&A Is there any way to Terraform Ceres?

In the "Warlords" Universe Ceres is the diplomatic and economic hub of the asteroid belt dominated by the rule of the 'Governor' and the 'Intercessor' (The Speaker for the Hegemon herself). Now I'...

4 answers  ·  posted 6y ago by Celestial Dragon Emperor‭  ·  last activity 6y ago by Celestial Dragon Emperor‭

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Q&A Could a river on Earth be made of a liquid other than water?

So far as I can research, all rivers on Earth are flowing water. There are other substances that are liquid at room temperature. Are there any natural processes that could create a river of somethi...

3 answers  ·  posted 6y ago by SRM‭  ·  last activity 6y ago by SRM‭

Question rivers
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Q&A Mosquito Armageddon

I'm going camping in two weeks and I really don't want to get bit up by mosquitoes. So I want to figure out a way to commit total genocide of all mosquitoes in at least a 20 mile (32 KM) area aroun...

22 answers  ·  posted 6y ago by AndyD273‭  ·  last activity 6y ago by AndyD273‭

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Q&A Could you actually make Sandy's Treedome in real life?

So, I have a question that focuses on a character from a show, Spongebob. Sandy Cheeks lives in a reverse aquarium under the sea in Bikini Bottom, in a dome that looks like this The Treedome is m...

4 answers  ·  posted 6y ago by CollegeKid‭  ·  last activity 6y ago by CollegeKid‭

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Q&A Anatomically Correct Vodník

A submission for the Anatomically Correct Series. The Vodník (or Vodyanoy) are very interesting water spirits from Slavic mythology.They're described to have long green hair, and a face like a ...

1 answer  ·  posted 6y ago by TGCF ‭  ·  last activity 6y ago by TGCF ‭

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Q&A How fast can I flood the Netherlands entirely and permanently?

I want the Netherlands to be flooded entirely, and I want the event to be of such a scale that it goes faster than hydroengineering can keep up with. This will mean that I need a sea level rise of ...

28 answers  ·  posted 6y ago by Tinkeringbell‭  ·  last activity 6y ago by Tinkeringbell‭

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Q&A Could Organic systems ever power circuits?

I have a race of mainly insectoid aliens known as the Erepo who have virtually bioengineered a ecosystem around themselves. Now I currently have them using either organic systems they can "grow" or...

2 answers  ·  posted 6y ago by Celestial Dragon Emperor‭  ·  last activity 6y ago by Celestial Dragon Emperor‭

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Q&A Could near light speed ship dilate time severely enough to explore other stars with out breaking the light speed barrier?

At a constant 1G acceleration it takes a little less than a year to reach near light speed speeds. Time would dilate locally on the ship slowing time for them. Could the time dilation be pushed t...

3 answers  ·  posted 6y ago by Yaeger‭  ·  last activity 5y ago by Yaeger‭

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Q&A Would this type of atmosphere be suitable for human life?

I've been trying to create a Earth-like planet but I'm not sure if my planet's atmosphere is breathable. (It's mostly the amount of helium I'm worried about). I've tried to make it Earth-like whil...

4 answers  ·  posted 6y ago by A good username‭  ·  last activity 4y ago by A good username‭

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Q&A How could a humanoid baby glow from hunger?

I assume whatever organs are used for the bioluminescence must be inside the baby's abdomen and specialized for bioluminescence and since the glow is gone entirely at 6 months, those organs must di...

3 answers  ·  posted 6y ago by Caters‭  ·  last activity 6y ago by Caters‭

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Q&A Would Gecko Materials Work In A Vacuum

Geckos use the van der Waal force to stick to things, an effect that humans can replicate and make various materials that utilize such (like extra sticky gloves). My question is, would these work i...

2 answers  ·  posted 6y ago by The Imperial‭  ·  last activity 6y ago by The Imperial‭

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Q&A Metal-Feathered Macaw Viability Part 1: How Can It Fly?

More posts from this thread will be linked here: Metal-Feathered Macaw Viability Part 2: Best Wing Shape? Info I'm designing a macaw that has metal feathers, claws, and a metal beak--to be parti...

6 answers  ·  posted 6y ago by FoxElemental‭  ·  last activity 6y ago by FoxElemental‭

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Q&A Feasibility of spacecraft constructed from ice

Eskimos in space! Let's say, just for contextual concerns, that a band of water-rich comet miners want to use water-ice found in the outer Solar System as the main structural and functional compone...

4 answers  ·  posted 6y ago by B.fox‭  ·  last activity 6y ago by B.fox‭

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Q&A How flat is "Flat Space"?

The idea of "Flat Space", an area of space-time with minimal, preferably zero, gravitational curvature, is an important concept in many Sci-fi universes, often those with "jump-drive" based FTL tra...

3 answers  ·  posted 6y ago by Ash‭  ·  last activity 6y ago by Ash‭

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Q&A Are There Other Ways For Humans to Cool Down Besides Sweating?

It's been said that sweating is the human way of shedding off excess heat. But to do that requires a loss of water, which makes the overall sensation miserable and uncomfortable. Are there othe...

4 answers  ·  posted 6y ago by JohnWDailey‭  ·  last activity 6y ago by JohnWDailey‭

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Q&A In a spinning Dyson ring, would objects not touching the surface experience gravity?

I have a world inside a Dyson ring with a radius of ~1 AU, complete with humans, animals, plants, clouds, and Earth-like atmosphere. The ring is spinning at a particular angular speed, giving the i...

12 answers  ·  posted 6y ago by Sigma Ori‭  ·  last activity 6y ago by Sigma Ori‭

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Q&A Is using mine shafts to control a building's temperature logical?

I'm writing a story where there is a large mining outpost built on a moon. This mining outpost is one large building holding around a thousand people, with an extensive system of passages and mine...

4 answers  ·  posted 6y ago by PjRock‭  ·  last activity 6y ago by PjRock‭

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Q&A Is intelligent life possible at temperatures as low as -190°C?

I am creating a planet where life exists on big islands of frozen methane around the poles. I did some research: from what I understand, methane freezes around -180°C, so I wanted it to be -190°C...

6 answers  ·  posted 6y ago by Djaro‭  ·  last activity 6y ago by Djaro‭

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Q&A The Crowman race to space!

In this answer https://worldbuilding.stackexchange.com/a/25219/50641 (to the attached question) one of their counter points was "oh, crows use tools, therefore, human advantage negated". That got ...

3 answers  ·  posted 6y ago by SomeGuy‭  ·  last activity 5y ago by SomeGuy‭

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Q&A Is this reaction realistic enough?

I'm building a world which has, apart from the 'usual' stuff, 2 types of stones (haven't really decided on a name yet). Stone A holds some form of energy but when prompted by Stone B it will rele...

2 answers  ·  posted 6y ago by Totumus Maximus‭  ·  last activity 6y ago by Totumus Maximus‭

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Q&A Would the collapse of civilization make turning into a vampire and colonizing the ocean floor a sane idea?

One idea I've always wanted to try writing is the concept of vampires exploiting their lack of a need to breathe and generally low-maintenance biology to escape the brunt of the sun's rays by livin...

5 answers  ·  posted 6y ago by Jason Clyde‭  ·  last activity 6y ago by Jason Clyde‭

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Q&A How would a species turn its skin to stone?

I'm making a species that turns the outer layers of its skin to stone, for defense purposes. It'll also have eyes that glow yellow, due to ingesting sodium vapor or helium. Is there some way to com...

5 answers  ·  posted 6y ago by Geoff‭  ·  last activity 6y ago by Geoff‭

Question aliens
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Q&A Hydras as parasitic-mating, polyandrous amphibians?

This is the second question in a series about my ongoing worldbuilding project, which seeks to explain the evolution and biology of various fantasy creatures. The first one was: Is petrifying visi...

3 answers  ·  posted 6y ago by SealBoi‭  ·  last activity 6y ago by SealBoi‭