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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...
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'...
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...
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...
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...
A submission for the Anatomically Correct Series. The VodnÃk (or Vodyanoy) are very interesting water spirits from Slavic mythology.They're described to have long green hair, and a face like a ...
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 ...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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 ...
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...
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...
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...
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...
I'm writing a story about someone who is going to be frozen in cryo for about 450 years. He's frozen in 2120, so the technology is certainly well-developed in his time. I'm thinking maybe the cryo ...
