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Given an arbitrarily long time to do so, what is the maximum depth too which a dwarven civilization could practically extend their mines / cities? And what would be the final limiting factor preven...
Mammals live in some fairly extreme environments, but the most heat-tolerant ones all seem to cheat: e.g., they dig burrows to stay cool during the day and come out at night, avoiding the heat, or ...
I have some ideas regarding this, but thought I would check to see what you guys can come up with, as I found some of the ideas here often trump mine in originality and/or plausibility. So, I hav...
I am simply wondering if an organism could possess an enzyme that could ionize a noble gas such as argon, krypton, or xenon. I was thinking that the organism could obtain energy through light or ma...
I'm thinking of a predatory creature that lives deep inside large caves. Because this environment is so dark, the creature's eyes have disappeared through evolution since the creature relies on ech...
In our world, mountains generally only move up (while forming) or down (while eroding or sinking). Otherwise they follow the tectonic plates they happen to be on. In island chains like the Hawaiian...
While thinking about Starfish Prime's answer to the question Algae using UV light from auroras for photosynthesis, I considered the possibility of an alternate Earth which has a normal, Earth-like ...
In this alternate Earth, the axial tilt is still leaning to the extent of the temperate and polar zones having four seasons--spring, summer, autumn and winter. The one key difference is that each ...
I am inspired by some people who apparently believe chocolate milk comes from brown cows. I know that for sweet, delicious chocolate to come into existence, we need to do things to cocoa. Ferment ...
My method of breathing fire involves humans stomachs producing ethane or methane and them holding a lit flame near their faces and just breathing out of burping . Fire breathing in this is mo...
The goal is to get from Earth to the Outer Solar System, preferably the Kuiper Belt, as quickly as practical, with a crew of about 12, and a not-set-in-stone dry mass around 30 tons. The character...
I was hypothesizing an organism that could create it's own fire with the use of a flamethrower-like organ. I was thinking that this animal has a oxygen-free organ that hold diethylzinc and when the...
Recently I've been imagining living on a terraformed Venus in a distant future. I've a pretty good idea of how this can be done, having gone through many articles on how to terraform venus, so my q...
I've seen almost the same question here, but it was like Can a microorganism reproduce so fast, to be used as fuel?. Then, I was inspired and new question came up. Does some real microorganism in s...
My world has two races of mammalian mermen, one of which are somewhat monstrous and I'll call them "Abyssals" in this thread. I really want the Abyssals to 'breathe' underwater, as well as being ab...
In a certain star system, Star B orbits Star A. Planet C lies in between the two stars and also orbits Star A. Planet C and Star B share an orbital period, and are at roughly the same places in tha...
If a planet were to have a gravitational acceleration of .7g, how different would it be from walking on earth, assuming this is not someone born outside of earth. Would it be a slight bounce in you...
Would a "working deer" living in cities with hard paved or cobbled stone ground need "deershoes"? The deer are mainly used for light work: no heavy lifting or pulling. Would unchanged deer feet an...
Say you've got a space-faring civilization that needs a LOT of power. Sure, fusion is a thing, but there's really not that much helium-3 to be found in our solar system, and it's hard to get. So ...
inspire by xenomorph acid blood from alien movies. so the water either rivers, lakes, and oceans in my world or some of the regions is highly acidic because some of the dirt or stone minerals cont...
If germs from the past was brought to the present/future on a person (or by some other means of transportation) and we have immunity to its descendants, like the modern germs for example, would we ...
It is a known fact that magnesium is a very important part of photosynthesis and chlorophyll. I have looked everywhere to try to find out this question but I have never really gotten a solid answer...
Form follows function, or that's how the saying goes. Which isn't true for some things. That is to say, a large reason why humans use a base 10 numbering system is because we have 10 fingers, not t...
In this world, there are reptilean demi-humans (like lizardmen and lamia) which are appearance wise half-human half-reptile, they live in coexistence with humans and other types of demi-humans. The...
How could an organic, plant-like, intelligent organism move around space? Assuming that the body is inside a small meteoroid and that outside of the meteoroid is covered in tessellating leaves to...
