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For questions regarding the viability of a life-form design. These questions should focus on biologically plausible creatures.

18 votes
5 answers
2k views

How to justify digging claws and opposable thumbs in the same being

The fantasy creature I am imagining (planning a short story or two around) satisfies the following analogy: Human is to Chimpanzee as "This Thing" is to Badger. That is, the creature has a clear …
11 votes
Accepted

Anatomically Correct Mesopelagic Aves

Let's start with something in the Real World (TM), then try to see whether we can manipulate its future evolution into your creature. The thing I have in mind is the humble gannet, birds of the Morus …
cobaltduck's user avatar
  • 8,605
1 vote

How could a creature get off a planet without technology?

Your creature needs to accomplish two things: 1) escape velocity and 2) survive the harshness of space, all without the benefit of so much as a sharpened stick or flake of rock. This is going to be d …
Gryphon's user avatar
  • 11k
18 votes
2 answers
2k views

Anatomically Correct Boar Troll

I request some help with the design of one particular denizen of my fantasy world, tentatively named Boar Troll. It needs to be an ungulate or closely related creature with emerging sentience, and th …
1 vote

What kind of animals are my trolls?

I'm going to go add a fourth possibility to your crocodilian, amphibian, mammalian choice list: dinosaurid. First, the hair could be explained as pycnofibers, " hair-like filaments ... similar to, bu …
cobaltduck's user avatar
  • 8,605
6 votes

Humans with a scorpion-like tail?

Let's take inspiration from the claws of mantis shrimp. Their club- or spear-like claws are deployed by flexing and releasing bands of chitin. In the same way, your creature's tail would need such a …
cobaltduck's user avatar
  • 8,605
27 votes
Accepted

Could elves revolve their ears to listen to sounds?

Go backwards just a few small steps in our evolutionary tree, and you will encounter the primate sub-order strepsirrhini, consisting of lemurs, galagos, and lorises. These are perhaps not our fierces …
cobaltduck's user avatar
  • 8,605
24 votes
Accepted

What is plausible biology of ocean-dwelling, tool-using, intelligent creatures?

As far as we are currently aware, the most intelligent things in the oceans are the cetaceans (dolphins and whales) and the pinnipeds (seals, walrus, sea lions). Further, it is more tempting to want …
Community's user avatar
  • 1
19 votes
2 answers
2k views

You eat this plant, it eats you right back. Can it work?

Based on an answer of mine from a few months ago, I've been inspired to adapt the concept to my own Life Ball. Fair warning- this question and some of its links are not for the squeamish. May contai …
9 votes
3 answers
456 views

Civilized Dolphins and their Record Keeping

On the Life Ball of my fantasy stories, a particular species of delphinidae- I call them black dolphins- have evolved and advanced at least as much as humans and other intelligent races. A prior quest …
4 votes

Planet of the Aves: Quadrabirds

Your quadrabirds don't have to loose flight to have a walking fore-limb. Another answer already mentions that some groups of pterosaurs folded their wings when on the ground and used them for walking …
cobaltduck's user avatar
  • 8,605
12 votes

Planet of the Aves: First Steps

The meteor missed. The end-cretaceous mass extinction event didn't happen. Velociraptors and their friends lived on. They continued to evolve, to be large, and to eat whatever they wanted. We now …
cobaltduck's user avatar
  • 8,605
3 votes

Anatomically Correct Tomte

There are some real-world examples we can point to that indicate the possibility of a realistic small humanoid. Since we don't need anything exotic like antlers, carapaces, or magic, this should be s …
cobaltduck's user avatar
  • 8,605
2 votes

What are some evolutionary factors that could evolve a species like this?

Bullet points one through three in the question bring to mind an existing animal, the wallaby. (Note: this was originally written before the question was edited to add cat nose as a feature. The com …
cobaltduck's user avatar
  • 8,605
15 votes
Accepted

Anatomically Correct Harpy

To me, it is clear we need to start with a bird and evolve human-like features, as opposed to vice-versa. I will start with a bird whose name already implies where we are going- the harpy eagle (Harp …
cobaltduck's user avatar
  • 8,605

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