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The 10% conversion efficiency mentioned in other answers is a decent rule of thumb — there's a lot of variation in the real world, but if you assume that the total prey biomass equals somewhere aro...
An intelligent creature who's natural life span is around 50 years in which they need to feed to not die of starvation after which they naturally die. But killing other beings of their own species...
I have decided I will add my whole question"¦ I'm new give me a bit of grace"¦ I am creating a superhuman and I am in need of some helpful tips and answers. To get straight to the point I need t...
I am creating a superhuman that can raise her overall body temperature to 3,000 °F (1648.889 °C) but I need to know the exact requirements of how that could happen. Let's say this superhuman co...
Vampirism. There are benefits and drawbacks, but one of the benefits is not aging. Great if you get turned in your early twenties, but... what happens if you are turned earlier? Being turned as an...
After looking at concept art of various humanoid creatures portrayed in science fiction I noticed many artists tend to make the abdominal muscles of their creatures/aliens look similar to those mus...
My world has a medieval level civilization that has remained unchanged for millions of years. They look and act a lot like humans; they have language, culture, government, literature, and basic te...
The fleet in my setting are forced to leave the planet due to a volatile virus, and leave in pre-prepared spacefaring vessels capable of transporting ten million people per ship. The ships have alg...
The eyes with vertical pupils of small cats and some reptiles are very good at seeing better in the dark and avoiding being blinded thanks to their ability to regulate the amount of light that ente...
The advanced civilization in my story is trying to reach as many galaxies as possible in the next few billions years before the expansion of space has sent those galaxies permanently out of reach w...
We are using a Morris-Throne Wormhole Metric. Let's presume the throat of this wormhole (in internal hyperspace) is short, let's say 1km. Now, as you are travelling through the entrance wormhole,...
The local sapient species on a relatively Earthlike planet has constructed a space elevator. It is anchored along the equator. Due to unfortunate circumstances (and potentially divine intervention)...
Ok, so this is a culmination of a few questions into one final question: am I doing this right? I am trying to figure out the gravitational difference from one end of a continent to another. There ...
Ok so my creature will look like this They're not big, about 2 feet tall. They're technically amphibians but have the scaly hide of a reptile. They live near the sea. Their life cycle is simila...
A group of aliens are off to save the human race from extinction caused by a Lovecraftian monstrosity. In order to accomplish this feat, they go to Earth in order to harvest as many humans as po...
So, I'm creating a fantasy setting, and because why not, I decided to have giants. Not giant giants, just roughly 2 times the height of a human. Now, because physics is dumb, a giant species would ...
I've seen Which is easier to develop: a piston prop engine or a jet engine? and my own Effects of ~10atm pressure on engine design neither of which answers this. Would different atmospheric densit...
I have a spaceship which I want to have travel very quickly around a system like our own solar system -- let's say about 10 million miles per minute, which would go from Mars to Earth in ~15 minute...
Background A McKendree cylinder is a spinning space habitat in the style of an O'Neill cylinder (below), but orders of magnitude larger. McKendree habitats are hundreds of kilometres in diameter a...
Let's say that in an alternate universe, humans developed on a relatively small supercontinent, so their languages and cultures were somewhat similar. After a while, all of the nations merged into ...
The first two answers in the anatomically correct succubi question suggest a parasitic approach to the concept of succubi which snatches off human organs, either the tongue or the vagina and feed o...
Is my planet realistic? It doesn't need to be able to support life as it's just another planet in my solar system, but is a planet with such a high density and gravity really possible? I calculated...
In world building it is often interesting to consider extreme landscapes "“ how tall can a mountain be on Earth for example. But what is the tallest mountain possible in any gravitational environme...
I want to know what kind of toilet design for mermaid is, considering they live surrounded by water and they poop through the anus (or whatever the organs name is) that located in the front rather ...
Could a life form that uses superfluids as part of its biology exist? I've read in places that the issue for life outside of Earth and especially the theorised silicon lifeforms is that the existe...
