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Brown dwarf stars are cool. Both literally and figuratively; the temperature profile for cool brown dwarves runs somewhere between 225K and 600K. It's possible if not probable that there exist som...
Apparently it is theoretically possible for a planet to achieve a stable orbit around the singularity at the centre of a black hole within the event horizon. This means that life could hypothetical...
This question is inspired by the last paragraph of my answer here: Negating the negative effects of childbearing (A follow up question to this can be found here: Methods to ensure gene flow in spe...
Imagine the speed of light is 100 times that in our universe. Light from the moon takes about 1/100th of a second, the sunlight reaches our eyes in about 4 seconds, from nearby Alpha Centauri in ab...
If we were to pull the following races out of a D&D players handbook and remove them from the setting/history of Faerun and look at them from a biological/non-magic perspective (no other planes...
I have been reading on Wikipedia about cloning and am considering it a possibility for reproduction in my world. I am finding it slightly difficult to find all of the cons and pros associated with ...
Would it be possible to modify a human to be able to survive in space without protective gear? Genetic engineering and cybernetic enhancement are both allowed, although when not in space the perso...
Let us suppose that we have people who for all intents and purposes are human, except for one (not so) tiny modification: they are able to exert enough muscular force and react fast enough that the...
For my setting, I wanted my people to have entirely no concept of sexism whatsoever. To facilitate this, I have made it so that the females of my race are broad-shouldered and generally flat-cheste...
The Hydra is a mythical creature with the ability the regrow severed limbs, including the head(s). According to the dungeon and dragon 3.5 version of the hydra : each time one limb is separated fro...
I was amazed when I learned that Jupiter rotates on its axis once in only 9.8 Earth hours. (Yes, you can call me uneducated!) What if the rotation period was 24 Earth hours? What would change in th...
I'm not talking about stuff like radiation and mutations. I'm talking about mechanics (for now). Necessary effects: With superstrength, you can... lift objects weighing many tons without your f...
This question is related to the following question on whether complex life is possible without oxygen but is not a duplicate. I was doing some searching and found this and this link, the first on w...
In a world where travel is limited to the speed of light, reaching a different star, while not necessarily impossible, would be very time consuming. For an empire stretching across several solar sy...
Ignoring, for the sake of this question, how exactly the gravitational fields required for this to work are generated: The question Our stalwart adventurers have a spaceship, perhaps a gateship, ...
I have been trying to imagine a world which was also created by a Big Bang. Following is something that I have created so far: Another planet which was created also has species like us but they li...
Steampunk!! In a world without the fine electronics that we have today, would space travel be possible? ....I'm not averse to small amounts of magic in my steampunk worlds, but I'd like to keep i...
Every time a rocket is launched into space, debris accumulates. Every time an old satellite runs out of juice, it goes derelict and turns into more junk. Over the years, paint-chips, broken off sol...
As title suggests, what is the size limit by volume for a rocky planet, if any? Some ideas are discussed here, but I'm wondering if there is more concrete, expert evidence to point either way. If p...
Could a Dwarven society as described by Tolkien mythology actually work? Dwarves for the purposes of this question are short, stout, bearded men and women who live primarily underground. They have ...
In the world I have been working on my planet has a gelatinous mass of cells coexisting but not a technical single creature. It bridges the gap between single celled and complex and it grows in siz...
I recently asked about racing in space (The new Space Race - Racing!) and as expected while there were a few options they were mostly pretty limited. However 2012rcampion did suggest that sports i...
Let's say that I'm creating a world game that lasts for 1000 years (or more). The game involves players obtaining talented leaders, e.g. George Washington (military), Albert Einstein (science), etc...
Lets pretend that Mars was a bit larger, so the gravity could hold on to the water and possible atmosphere, and then play along with the accidents that happened on earth happened at a similar tact....
Let's assume a planet like ours, same size and same conditions. My characters live at approximately 60° North, in a boreal forest, with a climate much like the Nordic countries in Europe. They are...
