Questions tagged [biology]

For questions about living things. Does not exclude aliens, but additional information is usually necessary (consider using "xenobiology" instead).

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4
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1answer
56 views

Could a creature use lightning/electricity as its energy supply?

Could a creature use lightning (or any other source of electricity) as a sole energy source, and not need to eat? Would any additional organs be needed to store or use the electricity? I have a race ...
5
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2answers
92 views

How to sneakily erradicate thousands of humanoid tribes that live in the sea? [closed]

I wanted to kill them with a virus during a mating season, when most of them meet up in warmer waters, but it started to sound like a pretty cheap solution to me. Nobody would know if the tribes ...
3
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1answer
45 views

Alternative evolution mechanisms using cell fusion

I am trying to understand if it would be possible for organisms to evolve by different means other than random mutations and natural selection. Eukaryotes were predicted to be formed by fusion with ...
27
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9answers
5k views

Anatomically correct Arachne

In the fantasy culture it's not uncommon to find Giant spiders with the upper body of a human. There are many variants as the spider body having only 4 legs and the upper human body have 2 additional ...
2
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7answers
781 views

anatomy or musculature to achieve full rotate jaw?

you know a jaw or mouth where the jaw full of teeth fully rotate like a drill or gear to shred their food or prey, usually show often in worm type of monster (my question is not necessary to be worm ...
2
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1answer
54 views

Could penguins evolve to have fingers?

I've been trying to make a penguin-like humanoid race for a pretty long time now. I want to make them as realistic as possible. And I know such creatures could not exist in the real world, but I want ...
6
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2answers
340 views

To carry a person in its palm (like King Kong) how much pressure and at what speed would a kaiju need to apply?

Assume my kaiju is around 200 feet tall, weighs around 4,000 US tonnes and resembles a large lobster with two giant claws for its front legs and long spindly limbs with tiny pincers on the ends for ...
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5answers
131 views

biologically or anatomically is there a problem with this type of double mouth or jaws?

i am not talking about xenomorph or moray eel type of jaws or multiple mouth or lower jaw inside the mouth. but this type of mouth/jaws or i called it double chin jaws where the chin also work as ...
10
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7answers
2k views

Would a sapient being sensitive to polarized light be able to see the angle of polarization in a photograph?

Many animals have the ability to see polarized light (or rather, are sensitive to the direction of polarization), most notably birds and bees but also a wide range of other animals including ...
3
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1answer
80 views

How long can a human body function at safe levels in slightly higher and lower gravity?

I have a number of alien species from different planets with gravity between 0.5g and 1.75g and I wanted to have groups of each of the species to exist together in a space habitat. As pointed out to ...
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0answers
26 views

How to make penguins a plausible humanoid race? [closed]

I have been thinking of writing a story for many years. However I don't like the idea of using humans as my main characters. I always thought about using penguins. I already have their world, ...
5
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4answers
193 views

How big can a giant get before losing human level intelligence?

In many fantasy worlds, giants are as intelligent as human beings and others races that they either avoid stepping on or step on regularly. However, due to the square cube law, giants have a limited ...
2
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0answers
30 views

Giant velvet mites?

Velvet mites are some of the largest mites in the world, with species in the genus Dinothrombium reaching 12 mm in length (absolutely massive for a mite). What is the largest possible size a velvet ...
9
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6answers
4k views

Human/alien breeding generating an alien

I hope my question isn't too vague or broad. It's a follow-up to this one. So, we have a human (genetically modified in order to support life on another place, from previous question) on an alien ...
4
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2answers
113 views

is it possible for quadrupedal or hexapodal flying monster to fly well while their limbs retracted?

just suddenly struck by curiosity, i vaguely remember that big quadrupedal or hexapodal (if you count the wings) animals cant fly well basically. I dont remember why, but i think it was related to ...
5
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2answers
110 views

A creature with a built in flashlight

I know things like flashlight fish exist; things with luminescence and all that. But how strong could the light be? I have this cave dwelling species with three eyes except the middle one isn't ...
3
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1answer
74 views

More Human-Like Secretary Birds

So, I am dealing with a certain trouble that I'll need a help with. In my fantasy story, there is artificially formed species (magically created, but non-magic anatomy rules apply) of "humanized" ...
5
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2answers
70 views

Proportions of a giant humanoid?

In a humanoid mammal, say 15-20 feet tall, how would the brain, heart, reproductive organs, facial feature and other attributes scale up? In very large mammals, the brain seems to be comparatively ...
5
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4answers
159 views

What would the biology of magic plants that get their energy through pure darkness look like?

In a world just like our own, one day, everything turned dark. Literally, as the planet was consumed by near-total darkness, the clouds turning black and allow little to no natural sunlight through ...
5
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4answers
2k views

Could a catdog hybrid exist?

Is there any way a catdog (like from the television program Catdog) could survive? If it could survive could it evolve? Are there any reasons it couldn't?
6
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2answers
61 views

Most efficient actinopterygian jaw structure?

Ray-finned fishes have a variety of interesting and complex jaw structures. Here is the skeleton of an anglerfish Here is the skull of another actinopterygian I am designing a large (roughly ...
21
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6answers
3k views

The Biological Dullahan

On my quest to make pretty much every single fantasy creature biologically feasible I have come across a hiccup. It wasn't angels, no you people helped me with that. Demons are easy, we have plenty of ...
3
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1answer
58 views

Anatomically correct quadrupedal arthropod?

Most arthropods have at least six legs. Some mites have four and some insects have none, but for the most part, they have six or more. What would the anatomy of a large quadrupedal arthropod be like? ...
5
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4answers
460 views

Are kaiju more probable if they aren't carbon-based lifeforms?

I don't know the science involved, so I'm hoping someone else does. But is it more probable a giant creature of that size and capability would be more likely to exist if it were, say, a silicon-based ...
3
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1answer
71 views

How would Humans change, or evolve, to being Domed for many thousands of years?

A little snippet from my story idea, for some context- "The Earth Government Collapses, caused by the cutoff of resources from the Colonies. Large-Scale war soon erupts, with Nuclear Weapons being ...
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3answers
2k views

Feasibility of six inch space-faring aliens

I’ve recently been playing a alien game with various alien species. After playing for a bit, I wondered whether or not a 6-inch tall intelligent race could exist. I can already see some major ...
2
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0answers
86 views

Largest possible worm? [duplicate]

Earthworms can reach 22 feet in length, nematodes can grow to 27 feet, tapeworms can reach 130, and some ribbon worms can stretch 180 feet. In my world, I want giant worms with hundreds of feet long ...
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7answers
7k views

Anatomically Correct Pegasus

This is part of the Anatomically Correct Series. I've been wondering how an anatomically correct pegasus could evolve. Pegasus characteristics They are pretty obvious, but just in case: Horse size ...
4
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1answer
97 views

How large can an animal's eye realistically get?

The largest eye in the world belongs to the giant squid, which has eyes up to 27 cm in diameter (some reports from the 1800s say 40 cm). Extinct ichthyosaurs also had very large eyes, 20-30 cm in ...
6
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3answers
203 views

Is there any limit to how large terrestrial gastropods can be?

I know that practially all other terrestrial invertebrates are inherently limited in size, primarily by their exoskeletons, and by their respiratory systems, which impose upper thresholds on their ...
3
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1answer
102 views

Does this magic system seem sufficiently hard-rational?

The world I'm making is primarily sci-fi with a few elements of hard fantasy (the fantasy is mostly aesthetic). The magic system I've come up with so far consists of these premises: 1) Everything in ...
7
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5answers
170 views

Evolved insect eyes

In one question I asked how insects can evolve their base biology to grow in size here. Which was followed up by this question about how well the antennae would fare when increased in size here ...
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17answers
7k views

What species will benefit most from humanity's having been here?

Assuming that as a species, we do ourselves in, not through war but through environmental neglect and overpopulation, what species will benefit most from the effect we have had on the planet during ...
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6answers
2k views

Ending “Natural” Reproduction

Quick Overview Here's the situation: your species, under directive of your friendly world government, has been informed that all "natural" (aka reproducing like your normally would and having a child ...
7
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6answers
528 views

why wouldn't a beneficial mutation be passed down to descendants?

Individuals are born with mana, which accounts for their life force and has a hand in determining the strength of their spells. Mana level and composition is determined by a person's genes, which they ...
2
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2answers
48 views

How would head shaping affect the ligament attachments of a gorillas skull?

After researching many head shaping cultures like the Paracas and proto Nazca it seems there is no adverse affects beyond physical. What would the affects be on a gorilla? Would it be able to function ...
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4answers
2k views

Can humanoids be reborn from a tree?

Details: A culture of dryads has a strange death tradition. When a dryad dies there's usually a medic, or better say a "shaman" that rips a strange looking organ or gland off their head. The gland, ...
28
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3answers
540 views

Physical speed of insectoid lifeforms

Would humanoid sized insectoid lifeforms be relatively slow considering that their exoskeleton would have to be rather heavy since it takes more 'armor' to get the same relative protection? Generally ...
8
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4answers
2k views

Could life have evolved as described by Lamarck's theory of evolution, instead of Darwin's?

Background Information As we all know, life as we know it today is caused by the process of natural selection, sometimes referred to as survival of the fittest, as proposed by Darwin. Essentially, ...
5
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1answer
98 views

Superfluid lifeform

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 existence ...
5
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2answers
146 views

How quickly could a “shapeshifter” lose mass, realistically?

Shapeshifters and mass... ever the bane of realistic science fiction. Basics: Let's say someone is changing shape (for whatever reason, voluntary or involuntary, it doesn't matter for this purpose). ...
18
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9answers
5k views

How can I explain alien skin being different colors?

In humans skin color varies slightly in shades of dark brown to a faded pink, which has the purpose of protecting the skin from sunlight. An idea used commonly by people beginning designing alien is ...
7
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1answer
56 views

How fast can a large animal knuckle-walk?

Start with a silverback gorilla, make it roughly three times bigger, assume it's bone and muscle structure is capable of compensating for the increased size: how fast can a thing like that reasonably ...
7
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4answers
222 views

The Western Birds--Ideal Substitutes to the Penguins?

Anytime one thinks "flightless bird" and "aquatic bird" put together, one would immediately think of Sphenisciformes, the penguins. But during the Late Cretaceous, there swam a different kind of ...
2
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0answers
43 views

Selection pressures acting on the Goliath from 'Evolve?' [closed]

I know someone's already asked wether this thing was feasible, but I had a slightly different question: I wanted to know what kinds of things could drive something to... well 'evolve' the way the ...
2
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1answer
93 views

Could life similar to life on earth exist and evolve in a large enough region of timespace?

Is it possible for a planetary system to form and support life similar to earth-life inside a region of 'timespace' (which is the space within a black-hole), assuming that there is enough space/time ...
6
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3answers
263 views

Is it possible for plants such as trees or grasses to evolve to exploit bioluminescent bacteria?

Would it be possible for plants to evolve a co-dependency on a community of bioluminescent bacteria in order to survive in a low or zero light environment? Such as the plant gathering nutrients and ...
4
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3answers
107 views

Could an animal evolve iridescent horns that appear metallic like chrysina resplendens' chitinous exoskeletons?

Sort of two questions here, but very related. One about whether a mammal-like animal could evolve to have a chitinous endoskeleton, I guess. Then a question of whether, if they grow horns, that ...
5
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2answers
105 views

Is it possible to retrofit white blood cells with neural network technology to fight infection?

I have been toying the idea of fusing our white blood cells which search and destroy malicious foreign bodies with artificial intelligence to fight various disease causing pathogens, my worry is that ...
6
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3answers
255 views

Anatomically Correct Cockatrice

In short summary A cockatrice is is essentially a a two legged dragon that has the head and body of a rooster, it also has a serpentine like tail and either has feather like wings or webbed like ...

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