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I have a K-type star (0.5 stellar masses) as the central body, and the planets are as follows (those I want to be in the habitable zone in bold): I: An uninhabitable rocky inner planet 50% the mas...
What would be an efficient method of global travel that can take you from, let's say, London to Hong Kong in about an hour? It would preferably be made quickly, but money is no object. I don't want...
How could a generation ship "steal" energy or resources from star systems which it passed without changing velocity?
We often see, in Sci-fi, food being produced from, say, algae or yeast. What could be the effect of such a limited diet on the gut microbiome? Would there be any believable side-effect that would h...
In many movies, alien species often have the ability to impregnate "every and any" species and have their mutant offspring. I have a story setup where some, not so conscientious, scientists decide...
I've been recently looking into alternative biochemistries for life and the environments were these could be found. I already asked a question about how ammonia oceans might form a while back. Toda...
A civilization has begun its space program without any knowledge of general or special relativity. How would this affect the program? Would this establish any limits on where/how they could travel?...
I'm trying to not delve too into the sciences so as to keep things fairly suitable for a space opera setting, but I'm trying to figure a few things to a reasonable degree of detail. My question he...
In recent years, we have found evidence in the Negev Desert of the Middle East of a striped hyena, a solitary carnivoran, tagging along with a pack of wolves. This sort of alliance is found nowher...
Let's imagine a planet that is 5000 km in diameter but has the mass of the Earth. I'd imagine standing on that planet might feel similar to standing on the Earth, because the gravity would be compa...
Have a creature from a dream. It's a carbon based humanoid creature partly made of the mineral olivine. Could there be any reason it might contain this mineral? Perhaps a show of health - the more ...
"However, King Crimson has already seen through it. Your movements in the future. The trajectory of your movements in the future." "No matter who you may be, everyone goes through their ups...
I have some research that it needs a good space suit to protect you from heat and cold but I need more so, what does planet mercury need to sustain life for humans? what could we as humans do to ha...
I have a world that isn't an exact analogue to medieval technology, closer to the late 1700s in terms of culture and agriculture/metallurgy, only without gunpowder. I have them ahead of real histor...
I need to wipe out a city. Not a huge one (I won't let them grow beyond a certain limit), but big enough to need to do some pretty serious damage. Let's say something similar in size to Pompeii. (y...
As asked in the title, what would be the upper limits to a rocky planet's size in orbit of an O type star, like 10 Lacerta's habitable zone? Density of the planet must be enough to stand on without...
I'm building a world where high-density, low cost batteries are discovered far, far in advance of modern times, leading to a decentralised power grid. It has become convention for homes and buildin...
A bigfoot is hiding in the Canadian Pine forests. Why haven't the thermal imaging satellites picked up the huge animal all this time? Is there some way an animal can hide from thermal imaging came...
I ask this question because in my fictional world, I want to create extremely cold, populated areas, especially in Northernmost areas, but I noticed that in our real world, regions with less than -...
I have a new creature from my complex remembered dreams. It's skin color is a dark color similar to the skin of a Silkie chicken. The thing I saw in the dream also has white feathers. It's body is...
Background: It is sometime in the late 21st century. Several unmanned probes have recently been sent to land on and investigate Jupiter and Saturn's moons. Two sites in particular, Europa and Titan...
The "Weird" spell in my world is basically a magical version of the US government's goals with the "MK Ultra" project from the 1950s: it induces a shared hallucination in every creature within a 9....
In large doses, the body's ability to change cyanide into thiocyanate is overwhelmed. Large doses of cyanide prevent cells from using oxygen and eventually these cells die. The heart, respiratory s...
Would a horse (trained or otherwise) not be wholly spooked by a Dragon merely flying overhead, even more so trying to enter combat with it or just trying to approach it under any circumstances? Wh...
I am working on a habitable planet that orbits around a red dwarf star and it is about 1.5 times bigger and more massive than the Earth. Gravity there is stronger and the atmosphere is thicker. No...
