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In the world I am building there are rat-like primates called iolasae, or mane-beast, In this family of primates there are sapient humanoid creatures called lokk, They have digitigrade legs, long arms …

I wish there was more to say, this question was inspired by this image. Now I know that they are robots but is there a way that I could achieve glowing eyes in real biology?

Let's assume that somehow a hoofed creature became a carnivore. Since hoofs are inferior in every way for hunting animals, it make sense that the species would need to evolve to hunt better. Thus, if …

Tattoos and nail paint would be forbidden. The most shameful form of execution would be cutting off the hands or slitting the wrists. Hand models would be on par with Pornstars. Rings could be a sign …

Let's consider the fact that the Sun is actually harmful to most creatures, given the right conditions. Humans around the world get sunburned every day, and millions contract skin cancer every year as …

While not consuming, perhaps they swallow stones in order to break ups actual food, but consuming rocks for nutrients, not feasible.

We see a lot of movies and books with humans(or near human creatures) that live for hundreds of years. I've seen numbers for long lasting human ranged from 150 all the way up to 7000( and I'm sure tha …

In a world I am building, human and a plethora of aliens have met and they are meeting, but unlike many stories on the topic, this scenario focuses on the individuals; how does Conner interact with xy …

In the world I am building there are rat-like primates called iolasae, or mane-beast, which are the new world equivalent of great apes. In this family of primates there are sentient humanoid creatures …

If our hands had 2 thumbs and 3 fingers how would they work? I mainly concerned with the bones and how they would interfere and interact with each other. But the muscle work would be helpful as well. …

In a world similar to Earth where multiple species are able to achieve human-like sentience, what is the realistic limit for the number species that will actually achieve it concurrently?

In my world, for reasons that are unimportant for now, there can be no agriculture. Because of this, civilization can not depend upon agriculture, as we practice it, for a food supply. A solution for …

Many species of amphibians, fish, arthropods and even certain reptiles go through metamorphosis. But, to my knowledge, there are no mammals that go through metamorphosis. Let's say I want there to b …

This question has no background information here. I just want to know if there are any evolutionary advantages for a species to have 4 ears?(The kind a mammal has).

In countless science fiction series, mainly the more popular ones, almost all of the aliens appear humanoid, that is bipedal with 2 arms and two legs. Is it a bad idea to include this in worldbuilding …