Questions tagged [evolution]

For questions about the long-term change of a specific species, type of creature, or trait, usually through the process of natural selection and reproduction. Ideal questions focus on traits, not entire creatures. Consider also [creature-design].

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7
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1answer
80 views

Sand Plankton. Is it possible?

In many Sci Fi and Fantasy worlds, the deserts are filled with giant megafauna that swim through dunes of loose sand. The issue with this depiction of course is not just the size of said sand ...
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Could the Earth survive without animals and have only plants and fungi populate it? [duplicate]

My question is very specific. If the Earth had evolved to never have animals, and instead only have plants and fungi, could the Earth be habitable for humans, or any life at all? Could it be ...
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5answers
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How can I have the name of the first tribe on a newly discovered continent established as the entire continents name, even after kingdoms are formed?

I have a group of humans who discovered a continent that has no civilisations yet. They settled at a small region and they name their tribe and their lands after one of their Gods. They believed he ...
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1answer
88 views

What would aliens with 'automated muscles' be like?

The automated muscles would be an alternative to animal muscles, which consist of a tissue that contracts like muscles, but does this on a cyclic 'timetable' which is synchronised across the entire ...
3
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1answer
90 views

Could terrestrial plants emerge from seaweeds?

Is it possible that plant life (or rather, alien plant analogues) could start as seaweed in water, before evolving to become terrestrial, similarly to what happened with animals and fungi? And if so, ...
4
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1answer
62 views

What kinds of creatures would likely evolve in this enviroment

In my verse there is one planet which is very warm and typically dry, deserts of black sands or large stone plateaus, outside of the area around rivers and on the lush sides of mountains. This also ...
4
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2answers
111 views

Naga evolution based on varanids

In some moment I saw a sketch representing some kind of naga, you know, a mythical species with human torso and the rest of the body with serpentine form, but in this case based on a speculative ...
5
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1answer
96 views

Humanoid Species

I am developing a form of humanoid very closely related to humanity, and I am trying to see both what differences are possible, and what the explanation for various features are possible. For example, ...
5
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5answers
180 views

Theoretical Evolutions of Domesticated Lions

So in my fictional universe there is a collection of tribes which, over the millennia, domesticated a closely related ancestor to modern day lions, much like how humans domesticated closely related ...
6
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4answers
645 views

How to justify new diverse cultures from the same ancestors [closed]

I'm struggling a bit in my worldbuilding on justifying the creation of different cultures on my land, when all originated from the same ancestors. So on my continent I have a group of humans that ...
6
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1answer
172 views

The biggest bear

I've read different accounts of the largest bear ever shot, the size of polar bears before climate change, and the extinct variations of cave bear and the short face bear. They all top out near 3m in ...
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2answers
86 views

How a creature can shift out of existence and back? [closed]

My "ghosts" are creatures that can exist and not exist at the same time. They have the following characteristics: "ghosts" are a species of long-living creatures with 4 limbs, 1 ...
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3answers
91 views

What Environmental Factors Would Lead To The Evolution Of A Large, Warrior Homonid Race?

I'm working on a story that involve numerous types of species being pitted against one another, each one similar to humans but differing due to an evolutionary "theme". These "themed&...
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5answers
403 views

Lungs evolving before/instead of gills

Gills are fragile, exposed continuously to parasites and bacteria. Having gills is like going around the streets with "eat my respiratory system please" written on your back. Plus animals ...
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1answer
118 views

Creating Genetically Engineered Individuals [closed]

Let's say I want to make a genetically engineered being, who doesn't have iron-based blood, and is an improvement on humans across the board: strictly stronger, more resilient, greater lung capacity, ...
5
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1answer
65 views

Evolution of ossicones like structures to tentacle or trunk like limbs

A time ago I made a similar question which is this and some time after other similar which is this. So I can consider this new question an improvement or continuation of what I wanted to achieve with ...
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1answer
57 views

Elastic alien humanoids?

How could you explain an alien race having the power of elasticity? By that I mean able to stretch out its limbs as if made of rubber. Think Mr. Fantastic or Elastigirl, but an entire species can do ...
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0answers
64 views

World with Demons, Merfolk, Angels, and Humans living together

I am writing a prospective scenario for a satirical horror-comedy and science-fantasy Web-series for adolescents (or teenagers if you want) and adults where humans cohabit with demons, merfolk, and ...
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1answer
98 views

Could my Adnaps exist?

I imagined a hypothetical mammalian species of the Cetartiodactyla order and of the Ruminantia suborder: adnaps. They are the opposite of giant pandas: if giant pandas are vegetarian carnivores (they ...
4
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1answer
330 views

What would be the evolutionary drives of a lush cave environment?

Now, for my D&D-style world, there is an extremely large cave system hidden beneath a mountain. These caverns are illuminated by processes that are a bit too complicated to divulge, but in any ...
5
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1answer
98 views

Complexity of ecosystems in oceans of rogue planets

I'm looking into building a setting for my alien biosphere. I thought that a rogue terrestrial planet, ejected from its home system and then developing life underneath the ice of its deep oceans, with ...
6
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2answers
192 views

Could an amniote evolve into an amphibian?

Could a creature which lays amniote-like eggs evolve into a creature similar to modern amphibians? The creature would be amphibious, spending most of their time in freshwater, and coming onto land to ...
3
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4answers
186 views

Teeth that grow proportionately to your size

Before we start, I'm not talking about the continuously growing teeth of rodents, or the tusks of elephants. Instead, what I'm looking for is one set of teeth that could fit in a newborn's skull, that ...
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2answers
698 views

How would I make a natural, long-lived red giant star?

I have a system in which the main habitable planets are on the many moons of a super-neptune. The ice giant has not migrated inwards, but rather the habitable zone has expanded outwards due to the red ...
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2answers
82 views

How would telepathy among kinsmen effect preindustrial societies? [closed]

So if people from the same family can communicate telepathically over long distances, how would that effect postindustrial societies? Ie rome, medieval times or even early modern times The way it ...
3
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1answer
57 views

What would an erosion resistance ecological system look like?

I was thinking about how given a whole host of sci-fi scenarios, you end up with landmass but no form of geological activity or plate tectonics, and so ensuring you end up with a lot of scenarios ...
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4answers
2k views

Would limbs evolve underwater?

So the premise is that life under the sea and life on the ground has evolved independently and achieved sentience. Finally, the land creatures (I'm using humans for now because of simplicity, I'm ...
2
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1answer
80 views

Pros and cons of separating olfactory and respiratory systems? [closed]

So, I watched James Cameron's "Avatar" a few days ago and something on the wildlife of Pandora caught my attention: Most* of the creatures seem to have distinct organs for breathing and for ...
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3answers
480 views

Would a constant barrage of radiation over countless generations of creatures recreate a “mutant” as shown in science fiction?

Now, this may seem similar to another question you may have seen on this website, where they ask whether after a nuclear apocalypse, if it is possible for mutants to evolve. However, this is a bit ...
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6answers
2k views

Implications of a Race which becomes Smarter when in Danger

So I'm designing an alien race loosely based on the Kafers from the tabletop RPG 2300 AD. These aliens not only become temporarily hyper intelligent as an electrochemical effect of their equivalent to ...
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1answer
102 views

How would monsters realistically exist in our world? [closed]

How would monsters exist in real life? Setting: The world is like ours, but with some changes. The geography is as if the tectonic plates did a different thing, the plants are similar but there also ...
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4answers
283 views

What forms of life would be best adapted to living on a world with nine year long days?

Let us suppose that instead of the 24 hour cycle we currently enjoy on Earth between day and night, we instead lived on a planet with a day/night cycle that lasted a full 9 years. The noon of the day ...
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2answers
99 views

Quadrupedal super predators [closed]

Could a quadrupedal carnivore reach similar sizes to that of large theropods. I know crocodilians technically count, but they're very low to the ground and have sprawled out limbs, so could a ...
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2answers
121 views

Evolutionary narrative for brains that evolve abstract thought alongside bodily function control

Premise Typically, we might view the evolution of the brain as a linear progression: with its primitive reptilian brain stem as the origin and the lofty neocortex as the pinnacle. However, I'm aiming ...
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0answers
55 views

How could creatures evole without night vision in a dayless world? [closed]

Basically, I want creatures that are as human-like as possible to have evolved on a dayless planet. Nevermind how there could even be lfe, I aready have that covered. I want them to have as close to ...
4
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1answer
146 views

Could my Kangaroo-Monkeys exist?

Kangaroo-Monkeys are a mammalian species from the Euarchontoglires super-order. Some basic characteristics of my kangaroo-monkeys include: Are excellent bipedal jumpers (they jump from the ground); ...
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2answers
126 views

How to Cause a Hydrosphere Apocalypse Part II The Great Flood

This is part two of a two part question. You can find part one here.(How to Cause a Hydrosphere Apocalypse Part I The Great Drought) One of the more interesting movies I watched growing up was ...
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1answer
117 views

Could antfolk reasonably evolve on Earth? [closed]

The following is a description for antfolk: Antfolk are an intelligent species native to an area of Africa, most likely the Congo, and are technically a species of ant. Their description is "...
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1answer
130 views

Should a space faring species interfere in a Mass-extinction event, which is necessary for the evolution of a future civilization? [closed]

I recently came across an audiobook called Permian by Devyn Regueira. The synopsis was about a recent discovery of fossilized eggs and two strange cave carvings in Siberia, one that describes the ...
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2answers
100 views

Radially symmetrical sophont? [closed]

Let's say you had a radial symmetry creature similar to a sea urchin or sea star. I'm not sure how many segments, just more than four. It starts out in the water of course, but moves on to land and ...
3
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4answers
576 views

Can a virus that causes forced evolution exist?

I recently watched a movie called The Cave. In the movie there's a group of spelunkers that get trapped in the cave with a bunch of blind monsters. towards the end of the movie, we find out that the ...
3
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4answers
210 views

Diversity of speculative evolution flight mechanics? Attempting to design a megafaunal, aerial diving predator

So, I'm trying to get a concept drawn up for this aerial predator, taking a lot of inspiration from Barlowe's Expedition and its Skewers. I would like to give it a unique mechanism for in-flight ...
4
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4answers
224 views

What would an until-recently waterworld look like?

So, suppose a world that, for most of its biological history, was a water world, with minimal dry land. Starting from the Cambrian Explosion analogue, the world stays like this for roughly 460 million ...
2
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3answers
143 views

Terrestrial coral reefs [closed]

I have an idea for a unique biome called a Terrestrial coral reef.It has a very similar climate to a tropical rainforest, and similar to a rainforest, its rich in biodiversity. but How can I make a ...
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1answer
55 views

Could my deuterostome-like species exist? [closed]

I am writing a science-fantasy story that is set in a pseudo-post-apocalyptic Earth ten million years in the future, and it is about a strange creature that looks vaguely a deuterostome called Céleste ...
0
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1answer
109 views

how would a “Flesh Forest” work? [closed]

I have an Idea for a strange Biome called a Flesh Forest. A Flesh Forest Is an ever expanding mat of flesh ,IT has several plant like structures growing out of it that possess Teeth .the entire mat is ...
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2answers
90 views

how reasonable is it for wyverns to evolve on earth?

assume wyverns are either mammalian, prootomammals, or avians. they have wings, three digits on the end of each, use fire breath (reacting hydrogen and oxygen or some other smokeless burning/explosion ...
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2answers
136 views

What would be the longest possible tree?

Note that I ask about the longest possible tree and not the tallest possible tree. There have been a number of questions about the tallest possible tree, and I wrote a detailed answer to one: https://...
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2answers
151 views

how to make realistic flying jellyfish?

I'm designing a terrestrial planet with 1.15 times Earth's gravity and about 1% helium in its atmosphere, as well as 1.2% hydrogen sulfide. The rest is very earthlike. A type of animal that has arisen,...
3
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3answers
207 views

How effective/plausible is vibration sense in the air?

I am developing a fictional species of raptor or raptor-like bird, with incredible senses, for a fantasy setting. One element of their combined sensory picture that I thought of was the use of sensory ...

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