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As I understand it, very small black holes have very small and close event horizons, and wouldn't necessarily pose a gravitational risk (I know they give off huge amounts of energy, but let's leave...
Details: Would it be possible to have a mountain spring that only flows occasionally, perhaps only for a few days, following moderate rainfall? The spring water would feed into an otherwise stagn...
As the title says... What would be the effect to earth or an oceanic planet if it lacks the presence of Radioactive Elements in its crust and mantle. Also can you explain what would happen if we d...
Kinda inspired by the non-disappearing ship question, but I actually asked this particular question on an unrelated forum a few years ago. Reposting it here (well, paraphrasing, really, since I don...
An idea for a story I'm working on involves a far away world that was once inhospitable. Scientists - likely alien ones - terraformed it so it could support life (coincidentally, Earth-like life). ...
In a previous question, I asked about whether a market for uploaded minds could exist. The overwhelming consensus of the answers was that it would pose astonishing ethical challenges and be radical...
The bonegrass fields are full of other life, despite their dangers. Lots of insects, some birds, and even a handful of reptiles have adapted to the paralytic nature of the air in order to reap the ...
The world is now a state where AI is sophisticated enough that it can read and meaningfully interpret draft bills/legislation. Human politicians are replaced with AIs in an attempt to combat corru...
I know about humans, and how we have adapted to different eviornments with skin and hair color, but I want something a little bit different for my creatures. They are amphibious humanoids, and live...
Why would a creature that lives on the surface of a planet evolve limbs that can bend at many points (like a tentacle or elephant trunk) and still end in some sort of hand-like appendage?
One common way sci-fi writers try to make their aliens seem more 'alien' is to give them an extra heart. This has been done for example in Babylon 5, Dr. Who and Alien Nation among others. But:...
Watching E.T. I was wondering what evolutionary factors could cause a species to have the appearance of E.T., like the environment he would likely live in and the gravity of his homeworld.
This is for a project where the electromagnetic pulse (EMP) from early US atomic bomb tests is somehow much more magnified than the destructive blast- so much so that it destroys electrical devices...
Suppose we have a group of organisms (I am not sure if its a society). These organisms are characterised by their ability to reproduce within themselves. That is, every member of this society can ...
In a world I'm designing, one of the eldest extant intelligent species is the Trolls. These are not D&D trolls, but something else. I have a number of basic characteristics for these beings, an...
For the following stars -A Class -F Class -G Class -K Class -M Class What are the most likely skin tones for each type of stellar class? Also for their eyesight how different is it to vary ...
George is supervillian, and he has a evil plan but he needs a distraction to pull it off. Earlier today he was reading supervillian weekly and he saw an article on faking the Apocalypse and he wan...
I have decided on my preferred method of zombie apocalypse. I have chosen super leeches. But I have run into some problems, I'm not entirely sure if such a thing would be possible. I have a few ide...
Basically, this is a setting in which artificial gravity generation is possible and can be confined to certain areas with different settings. There are maybe five human colonies on planets with nea...
My titled question was, can a planet without one or more moons be habitable? In more depth, how would that planet be affected overall, without the moon to affect the tides and without providing li...
Summary version: So we're talking people living on top of 30 miles of topsoil, fake dino fossils and water on the outer surface on a hollow (but sturdy) unobtanium sphere with a radius about 1 AU....
Dragons commonly breathe fire. They can do so over considerable distances, often many times their body length. But this needs to be powered somehow, by a substance that the dragon can generate on i...
Suppose a species has limitless resources and the ability to construct megastructures of an astronomical scale. Would it be possible, given antigravitational technology (hypothetical), to create a...
Scenario: Deadly virus wiped out 80 - 90% world population and it did it pretty quickly (in 2 months) Although it is plausible that among these 10 - 20% of survivors will be people who actually kn...
Once a long long time ago a guy called Newton came up with a law he called his 3rd law. "The laws of motion" Everyone knows about "Every action has an equal and opposite reaction" My question her...
