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I want to incorporate hot air balloons as a means of common travel in my fantasy world, but I recognize that hot air balloons aren't really "propel-able". My question is, how would someone hypothet...
Suppose we would create a river, canal or a tube around the earth and water would flow in it. Where would it flow? And if we put some turbines in this flow, could it produce free energy?
So I was building my world with underwater civilizations and someone raised a question (see here) that I thought was interesting related to trade aspect: how would we have a standardized measuremen...
In a brand baby spanking new world I am building, appropriately named Escargard, punningly named by the AndyD273, mollusks have become the dominant form of life. Resulting in aliens similar to thos...
Imagine a world much like Earth, except it is nearly tidally locked to its star, making a complete revolution every few thousand years. The planet is far enough away that there is a band of livable...
How can I make it so that an otherwise colonizable planet (or moon) can (entirely naturally) seem uninhabitable from a certain point on its surface? Background: There are a series of immovable gat...
By using antibiotics too frequently, some argue, we're setting the world up for a pandemic that we cannot treat. Every time an antibiotic substance is used, the bacteria that survive reproduce. Ev...
Let's take our regular "Great Blue Star Whale", with a mass of about 10 000 tons. That poor, poor whale is reaching the end of its life for whatever reasons. (Damn you! Space whale hunters!). It w...
Would it be possible to somehow inject astronauts cells with safe amounts of magnetic metals, or use some sort of magnetic properties, to hold them down to a space station floor with magnets?
In my high fantasy medieval world, the ocean is populated by underwater fish people and land dominated by your good old human. Different type of fish people (shark, whale, turtle, shellfish, etc.) ...
I need someone to fact-check me and tell me if there's anything immediately bogus or physically impossible with the scenario I'm about to propose. Billions of years ago, under the ice of Europa, t...
Here's the background. I'd like the planetary year to be just under 800 days, with a longer number of hours per day-cycle. If the settlers live in the Mediterranean type climate area only and use g...
Not a duplicate of "Overcoming language barrier; no speech" which confines answers to nothing that is clearly a form of communication; it focuses on translation, not physiology or evolution Not a ...
Some estimates put the percent of Earth's surface covered by landfills at 0.02%. Even if the world composted and recycled as much as possible, we would be left with an insanely large amount of w...
I have a metallic alloy called "Attrahite" in my world that conducts gravity the way that copper conducts electricity. Currently in the world, passing an electric charge through Attrahite "activate...
I'm building a Dyson sphere - a real one, like Freeman Dyson originally proposed, made of swarms of solar collectors in independent orbits that fully surround the star, something like this: Each...
If there's a habitable planet that orbits two suns like the above orbital route, what would possibly occur on that planet? Would it have two yearly seasonal cycle (compare to earth)? Would it be...
I'm considering a story set about fifty years (2065) in the future. It takes a rather optimistic view; space exploration has led to colonies on the Moon and Mars, as well as several space stations ...
UPDATE!!!! - FINISHED THE SCULPT :D [UPDATE: Much Much bigger response and feedback than i anticipated, I am hugely greatful and overwhelmed by the ideas and the help, I will keep the thread goi...
The most common explanation of what would happen to a space-ship that falls into a black hole ends with spaghettification. However imagine there was a space-ship built out of unobtanium, that cou...
Suppose in the future (about 3-4 decades in the future), we start preferring smaller people as mates. The average size of a human would go down, maybe as far as or further than average heights from...
So far, we see an alien life form depicted based on earth type of animal kingdom, we see an insect like Zerg, a humanoid grey alien, etc. However sometimes we see alien like Guardians of galaxy's ...
What circumstances would be required for a world in which human emotions directly affected the physical world. For example, if a person grew angry, releasing a burst of electrical energy which woul...
Would a state be able (with currently available technology) to cause cancer to its enemies, which it can't silence in a different way? (e.g. staged accidents, assassinations, imprisonment) Hugo Ch...
Knowledge has come to me recently that mussels can suck up pollutants, making them crucial cleanup crews in the New York filth. This knowledge is the inspiration for this alternate scenario, in wh...
