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As the title says, what would the universe be like if the gravitational force was 0.1% stronger but the other forces (strong and weak nuclear forces, electromagnetic force) stayed the same? Would t...
In the book 2010: Odyssey Two by Arthur C. Clarke, Jupiter is turned into a star. Presumably this is done by making it more dense, so if Jupiter were to reach that density and become a star, what w...
A planet could definitely have multiple gas layers. As was discussed here, gravity affects different gases differently, based on their mass. In other words, there would be more force between the Ea...
Often in films and television shows when a person's brain is 'injected' with more information than it can handle, they suffer from immense pain. What would actually happen if you did supply a huma...
Could a terrestrial planet have a stable set of layers of atmospheres, and could different lifeforms evolve within those different layers? This question is inspired by the diversity found on Earth...
One science fiction short story I read (I don't remember the title or author, sorry!) featured some small creatures (unnamed) that were formed from metal, with the argument that "just like life dev...
Broadly speaking you need three things: (1) something that makes it infeasible to keep living on land (most people won't move unless pushed), (2) the inability to evacuate from the planet, and (3) ...
I think we've established that this monstrous object is going to have to be pretty darn big. You suggested that it could be 500 kilometers in diameter; let's do the calculations to figure out just ...
Most science fiction stories has humans building large domes on the surface of planets like Mars or the Moon. But wouldn't it make more logistical sense to dig down and build down into the planet?...
The first thing that comes to mind is an incredibly large volcanic eruption. And I mean a huge eruption. Something never before seen on Earth. One of the largest (if not the largest) eruptions we k...
What kind of a scenario would have to occur in order for human beings to seek survival on the sea floor? It could be man made or natural, ice age or heat apocalypse, sudden disaster or gradual coll...
I'm going to talk about Earth below, but since you say "an Earth-like planet", consider that just an space-saving measure. Take an Earth-like planet, about the same size, composition and gravit...
I want to know about the plausibility and required parameters of the following scenario: Take an Earth-like planet, about the same size, composition and gravity. It has no plate tectonics to speak...
Following up on this question, Would Living Underground during Impact Winter be Ideal, I realized I have more questions. I was asking about an impact winter that was caused by an asteroid and lead...
Is it scientifically plausible for reincarnation to exist? When I think of reincarnation I am thinking of the following: Memories, personality, biases, opinions and feelings carry over from one ...
I was answering this question about how a living planet-organism could be possible, and realized I didn't know how such a planet-organism could produce a magnetic field. I postulated that it could ...
Under the circumstances you describe, my immediate reaction is that it would not be possible. The issue here is that the cluster would be fairly unstable. The black holes would all be mutually attr...
Within the Star Wars Extended Universe, there is a science base on a small object within a near impenetrable sphere of Black Holes. Is this possible? The place referenced is called the Maw Install...
Let's say you have a planet pretty similar to Earth. It resembles Earth at around the time life is thought to have begun - except that it's a bit less hostile to life. The atmosphere is mainly carb...
Suppose such an organism had evolved from using sound like most life we know to use different intensities, wave lengths, and hues of light to communicate. This is assuming that these creatures are...
What immediate effects would a small, short-term black hole have if it appeared in a residential backyard? How small or short-lived would it have to be to be survivable, if it is survivable at all?...
Could a planet have an orbit in the shape of a figure 8 around twin (possibly binary) stars? Mostly curious about the physical possibility of such an orbital arrangement; is it stable over a long ...
One thing that a few science fiction films seem to get wrong: it is extremely unlikely for two civilizations to evolve completely independently and yet be within a few hundred years of each other t...
I'd like to set a story in our solar system with Earth and the inner planets becoming uninhabitable and a new planet being required. If human beings decided to build a world by making slight deviat...
On earth most of our sealife is fishlike (excluding a few other species such as squid/octopus). As far as I'm aware there are no legged creatures which live solely in the sea. In my world I'd like...
