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My question is more science-based than hard sci-fi. Basically, I'm envisioning a scenario in which technology is advanced enough that life has spread through the solar system, and this mostly via s...
In continuation of my previous question, I'm wondering about the colour of a flat world's sky. To recap the previous question, I'm imagining a flat world with the sun fixed relatively low above th...
Okay, so, how does magic work? Magic, at the end of the day, is a swarm of tiny machines (hardly visible to the naked eye, but still within the 10-100 micrometer range) that carry out a task. Indi...
The Scarlet King is an eldritch god formed as the manifestation of the tension between the modern world and the pre-modern world and the rage it creates. Originally it existing as the concept of th...
Tools Tools are the most used thing known to man kind, they help us build, eat, sleep, learn, and much much more. However I've grown to be curious if insects could use tools, so far to my knowledg...
Let's say that a civilization has access to FTL. Let's say it is instantaneous so travel time between solar systems isn't a factor. How long would it take for them to spread out from their home sol...
I am trying to find out if I have thought of the correct anatomy requirements for designing non humanoid alien species. I am designing as many different biological species as I can with the aim of ...
I'm working on a first contact story set in the near future where an advanced alien species arrives at Earth and reveals itself to humanity, but is utterly baffled by the diversity of life that it ...
Humans have invented a technology that allows for teleportation of matter across any distance. These devices can, in theory, be scaled up to any size, so long as the necessary construction material...
Is there an example of substances interacting with each other in the following way? A is a lethal substance, killing within minutes to hours when orally ingested; anti-A is an antidote for A (or ...
In the anime, called Attack on Titan, the primary antagonists are these huge, humanoid creatures, called titans. Titans have sizes between 15 and 4 meters. Larger titans aren't unknown, but they s...
My world is spread across thousands of planets in thousands of star systems, with a sort of United Nations (of Planets) acting as intermediary to ensure peace and prosperity between the planets. E...
Let's say that there are some humanoid mammals that can talk like humans, and their voices are about the same (so not really high or low pitched). Some of them have different tongues too, really th...
Ok, to be honest, I don't believe about dragons having a special bladder or organ that stores up gas (especially methane) and having flint-like teeth or whatnot, or even having six limbs. Here's m...
How fast could run a humanoid being, how much damage could resist, how much weight could lift, how strong could hit, under the indicated evolutionary conditions? is there a limit? I have always tho...
I'm designing a species of tiny humanoids. They are about 13cm tall. Normally that would make them have very high pitched voices but I want them to be able to also speak in a lower pitch. Siamang...
Let's say there's a humanoid species that are essencialy humans but tiny, around 13cm tall. As their vocal chords are smaller they would have high pitched voices, but could that effect be minimized...
What size and/or mass of impactor would need to impact the moon to destroy its tidal lock so that it's orbit is noticeable within its phases? What side effects would this impactor cause, and how wo...
In a previous question I asked if a world similar to that envisioned in the Mars of Edgar Rice Burroughs / H G Wells could exist? And if so would canals be a practical way to make the planet habita...
I'll need to give some background to this question. I'm interested in the idea of a densely inhabited star system, and having large exomoons is one way that they can all orbit roughly at the same p...
Perissodactyla is an order of mammals consisting currently of the seventeen species of horses, rhinoceroses and tapirs. Usually, any clade is connected by a coupling of genetics and physical morph...
While my setting has magic, the material world acts the same way as ours. Only reason why I am mentioning magic in my question is because I'm explaining why I need to satisfy such an odd set of req...
What properties and side effects would an organism have if it were formed entirely from cancerous cells? Scientists collected a sample of a tumor from a patient for studies. Once cultivated the ce...
So, there is this entity in my story, Slenderman, who's ultimate technique is the Blackout. Blackout causes electronic devices and light-based communication to fail within a 5 km radius of a chose...
My story has several key locations that I would like to ground in a real place in North America. It takes place 50-60 years in the future after 97% of humanity has been wiped out. I'm having a hell...
