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Imagine a big planet, gravity quite strong, 1.5 times earth. Irregular surface, rocky etc... (though flora and fauna will come into it later). It has a very thick atmosphere, drained off by a twin ...
Imagine a sci-fi world where many organic civilizations would have raised and have an empire between many planets and systems. Even if there is some political tensions, they all live in peace toget...
On earth our continents move...real...real slow. This is of course a good thing for sentient life. I am trying to imagine/develop a world where...things move a bit faster...ok a lot faster, but i...
Lake Eyre in Australia has an area of roughly 4,000 square miles, but the basin itself is over 450,000 square miles. If the entire basin were freshwater, how would that affect the Outback's climate?
Thinking about the question about Arcologies I was wondering using known science and even a little speculated science would it be possible to safely land a large space ship on a planet similar in s...
Looking at all the movies that involve robots made from materials available from planet earth (think Pacific Rim, Iron Man etc. but not Transformers), what is the theoretical limit of the capabilit...
Lets assume we humankind can not only wormhole the spacecraft, but planets and moons. So, what would've happened to Earth if we pulled Europa to be Mars's third moon? What if we moved Titan in betw...
Suppose one fine day a mischievous god decided to eradicate all air molecules on Earth in an instant, my question is what will hapen to the ocean? Please kindly disregard (omit) your concern for li...
Let's say a human engineer comes across an alien electronics lab. It occurs to me that electrons are electrons, if the aliens are at a similar state of development to us then at least the simples...
Suppose a team of explorers touched down on an Earth-like planet which do not generate its own magnetic field and there are always a thick layer of cloud covering the sky at all time. My question i...
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...
Imagine the entire ocean becomes extremely corrosive due to ocean acidification over a couple of decades, all nations have agreed to erect a permanent barrier along all shorelines to seperate land ...
What is a quasi-creature plant? I define a quasi-creature plant as an organism that lives only through photosynthesis that moves with a speed in the same order of magnitude of that of an animal. ...
I have some ideas, but I'd like my fictional Roman (100BC) General Mikey (ha) to build a submarine(s). This should be able to navigate in lakes and calm shores of the Mediterranean, succeed in bri...
I am currently trying to create a very low fantasy setting, with the most scientific plausibility I can, in which, with technology and "human" development being akin to those of Earth's medieval pe...
Suppose that we pare down human consumption to a minimum survivable level across the Earth, and devote the entire surface of the planet (as well as the planet's interior, if needed) to support as m...
I've never been satisfied with how this has been handled in any sci-fi story I've read, watched, etc. It always seems to get handwaved away with "we have sensor packages of various powers" and "the...
The highest point in the Ethiopian Highlands is 14,928 feet above sea level. It is here that the Nile River begins its journey to the Mediterranean. If the highlands were instead 21,737 feet abov...
I'm designing a video game in which players command a small crew of aliens (10-20 of them) who are building an outpost on a planet. They are a bit larger than humans (around 2 meters tall) with abo...
Suppose human being evolved a special type of sensory organ that can detect Earth's magnetic field, beside discarding compass when hiking what else can we benefit from this extrasensory gift in the...
In my alternate Earths, the plant class Ginkgoopsida has retained its prehistoric diversity, unlike back home, in which only Ginkgo biloba remains. In order for that diversity to be possible in th...
Imagine a world so brilliant and yet unthinkable - a habitable Earth-like planet infested with intelligent life attempting to erect a flexible Dyson sphere enveloping two yellow hypergiants. I know...
The question is about what changes would have to be made to an Earth-like planet, in order to increase the density of air and hence make lifting gases more effective. If that is scientifically poss...
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...
I am wondering, what mechanism would be needed to generate gravity on a space ship in interstellar space, like we see it on Star Trek or Star Wars? What is the most realistic hypothetical way what ...
