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I'm working on a class of tetrapods similar to mammals with warm blood. I am planning for their metabolisms to be quite high on average, among the carnivores especially. They range in size from tw...
So my Keplerians have a menstrual cycle that typically lasts 45 days on average. My proposed menstrual cycle is dependent on ovulation. So multiple ovulations without a period could occur but multi...
With Mars' color coming from the iron oxide, is it possible for such a small body without an atmosphere to support that color?
We are living on this big lump of rock called the Earth, drifting ever so continuously through space. Now imagine a tiny but immovable object in space, a single atom of 'unexplanium', locked in sp...
In my fictional world I am planning to have a humanoid species living on an arctic continent, and I am wondering what type of biological adaptations a humanoid (as in, anatomically modern humans or...
We have a regular Earth as we know it, but instead of humans, there is this worm-like race, intelligent similarly as nowadays humans. Their inner physiology is different from our worms (and not imp...
Description So fellas have you ever head of pig from hell, well if you haven't its called the Entelodont and it is an extinct pig like omnivorous mammal that resembles a giant boar. It is thought ...
I am in pursuit of, as the title says, a multi-purpose horse, a single breed that can do all the things that the others were only specialized for: travel, labor, companionship, war, speed, strengt...
Previous parts here: Creating a scientifically semi-valid super-soldier, part 1: Skeleton Creating a scientifically semi-valid super-soldier, part 2: nervous system Creating a scientifically sem...
I need a mechanism/organism similar to rust and virus, that will both impair the ship's components AND will kill crew, so the only thing left are a few lucky survivors on a crippled ship. Presumab...
I'm designing a world with a humanoid race, which has two sexes, male which is analogue to human male, and hermaphrodite which is analogue to human women with additional male reproductive organs, l...
In many stories, the transformation of human to demon has been interesting to think about. This of course extends to mythology: In multiple folklore, it's said that Lilith became a demon of her ow...
Context In the arms race of survival many animals have developed ways of evading predators, but the animal I am interested in for this question would be the tiger moth. So basically these guys jam...
I'm ready to reduce a certain amount of scientific rigor for a good story. In my world, some person invents a theory of everything. Is there a way that scientists would test the theory, to prove t...
I've seen bird-human hybrids before in popular fiction, where they have legs, wings, AND arms. So I was wondering if this was really plausible. Humans don't want to give up the ability to manipulat...
How dense would an atmosphere (that's presumably non-toxic) need to be in order for a human being (without wings, artificial or otherwise) to achieve unassisted flight (without killing said person ...
I have read (and answered) the question: "If true artificially intelligent robots could be built, would they be allowed human rights?". But let's explore the topic from the other direction. Let's...
So, on the planet Aqautas, the Aquata species is the apex species. They have cities underwater, made of an alien coral, and submarines to get around the planet. Crime is also an issue however. The ...
Note: this question is not a duplicate. The accepted answer to the question "Anatomically correct Medusa" explains the petrifying vision via calcifying toxins spat from the snake hair. This a) woul...
Assuming that the observer is on the moon for a full lunar cycle, would the appearance of the planet wax and wane, would the moon's shadow occlude the planet during an eclipse while on the moon?
For a story I am drafting I would like to have droplets of fluid that form another shape than the regular domed droplets we usually see. Is there any other shape such as e.g. a doughnut-shape that ...
Spaceplanes are cool. SSTOs (Single Stage To Orbit) are even cooler. Imagine a spaceplane that is pretty much a 747. Imagine if Boeing decided to have a crazy new idea and made a space variant of ...
I am currently working on a world with a "human" species. The planet is similar to ours and these "humans" would evolve in a similar environment. I know that bio-luminescence appears mainly where ...
I am aware of being a newbie in the field I am asking my question... please be kind and explain what I did wrong if I make a mistake. The idea from where the problem bloom I love worldbuilding. W...
In my story, the humans of Earth have finally made the trek to Venus, and have discovered a previously unknown life form on Venus. On closer inspection of the mucus creatures, they seem to have the...
