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According to a recent National Geographic article, astronauts returning home after longer missions suffer permanently impaired vision. This is a problem that must be addressed in hard-science world...
Giant Planetary Ring Bases (or GPRB's) are space stations built on planetary rings or are artificial rings themselves, such as Starship Troopers' Luna Base But are these super stations feasible?...
The normal condition of life in a planet (Earth right now) is that below us is the planet's core, and above us is the sky. Now if there's a hollow planet like above, is that possible? How does ...
So I'm thinking about an underwater civilization and everything related to it, and I got to thinking about how they would communicate over extremely long distance. I knew that underwater species l...
I have wondered what a terrestrial ecosystem would look like dominated by cnidarians and ctenophores rather than insects and tetrapods. In order to fulfill the same niches I imagine they would need...
Ignorance is curable, living is forever. Robert A. Heinlein1 Cutting to the hard data: Due to some or another reason2 the genetic information stored inside cells (aka DNA) of my Immortals d...
In the year 2588, ISRO (Indian Space Research Organization) along with collaboration of NASA had discovered a new planet named Accio several light years farther than Pluto. Scientists have computed...
[Edit: I'm not looking for 100% realism. I'm looking for an explanation as realistic as possible, possible with just few exceptions to physics.] [Edit 2: In my imagination these worlds are differe...
What would the orbit of a planet orbiting two stars look like? Would the planet orbit the stars simultaneously or one after the other? How strong might be the gravity well of such a system be? Any ...
A civilization has a "magic" computer with memory and processing capacities far beyond what our physics says is possible. They decide to run a massive simulation of Conway's Game of Life with a ran...
Imagine a world that works mostly like our own: it's built of atoms and quantum particles, there's gravity and conservation of energy, etc. Perhaps the physical laws aren't exactly the same as our ...
According to multiple reputable sources, the idea of "photographic memory" in humans is a myth. While some people may be unusually adept at certain things involving memory - like remembering the la...
Detailed Synopsis: I started writing a story wherein advanced technology slowly stop working (starting from most advanced, and progressing until only handmade items function), while the global clim...
So, I created a planet that has a civilization that is beyond advanced. The planet's radius is 10x the radius of Earth, and is has the same density as Earth. What issues would I have with the grav...
The ODESSA network, a highly secretive organisation of former SS members, decides to hold the former Allied nations to ransom; with a giant parabolic mirror in space that can focus sunlight into an...
Simulation of artificial panspermia, in inter-galactic travel, as a model for the study of reproductive isolation. Case 1: If we send a mass of proto cells(kept alive by some mechanism like cr...
I'm looking for biological explanations for some traits I want to give to an alien creature. Description of the Creature It looks like a five foot tall praying mantis, or perhaps a centaur. It ha...
A plethora of previous questions have queried the existence of botanic (plant) intelligence and they all have created good solutions, but their still remains a even bigger problem to even the dumbe...
Is there any hypothetical way that a crazy advanced civilization could convert matter to digital form (or energy) and back? How far away might such technology be from our current tech level, if th...
Assuming humans live in dimension 3+1; 3 spatial dimensions, length width and height, and one dimension of time, Is it possible to move matter from our dimension 3+1 to another, such as 4+1 (addin...
I'll keep this one brief. I have an alien from a planet which has extremely cold nights and extremely hot days (the day and night cycle may be short or long, I haven't decided). When the alien get...
I have planet with twice the radius of Earth, with its core being the same absolute size as Earth's in order to provide magnetosphere, and the rest of the planet made of silicates like Earth's mant...
Being inspired by the lovely concept art of Star Trek's Nibiru, I have long thought that the Nibirans would use the tiered pools for aquacultural purposes, and would like to implement tiered aquacu...
Let's say that a race of aquatic merfolk have managed to achieve sapience, they are basic hunter gatherers, living in relatively shallow waters of up to 100 meters deep. As I have begun designing t...
A large railgun mounted on the spine of a mega-scale starship (20-32km) or an antimatter-powered missile launched outside the ship? For clarification's sake, when I say "safer" I'm referring to "sa...
