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. Consider also [creature-design].

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how would humans evolve?

what would happen if 50,000 humans were sent to a planet that has 3 times gravity, in a arid like environment.Through unknown means. The planet has a similar atmosphere to our own and the air is ...
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Feasibility of space faring centipedes

In the distant future, humanity has encountered, made peace and wars with countless advanced civilizations, but one civilization that still baffles them, is the race of intelligent centipedes. The ...
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Feasibility of a creature that leaves behind crystal like formations

In a distant future, humanity has colonized and catalogued countless worlds in their home galaxy. However one day humanity has discovered a few habitable words in the Andromeda galaxy. After a while ...
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How long would it take for segregate human populations to speciate to a point where they could not interbreed?

Coming from an earlier asked question, I was wondering how long it would take (potentially a range) for two human populations that are separated from each other to speciate enough that they would no ...
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5answers
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Hair as an olfactory organ: Feasible or dumb?

Within my setting, insects, due to a rather long (millions of years) and convoluted (gods suffering from empty nest syndrome) series of events, have evolved their exoskeletons into an endoskeleton of ...
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How Big Would We Be in a Venus-Sized Earth? [closed]

In the foreseeable future, we have found an alternate Earth with the same gravity, width, density and mass as Venus, but the core and atmospheric pressure are the same size as our Earth's. Since it ...
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adaptations for land-based octopuses

This is a follow up question to: How realistic is the Swampus? What adaptations would current octopus have to evolve, to become land based, meaning that they spend at least 1/3 of their time on land? ...
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How realistic is the Swampus?

In the 2002 documentary the future is wild, numerous biologists and other scientists speculated about the future evolution of various species. In the '100 million years in the future' segment, the "...
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How big can Europan fish get?

Assumptions: Jupiter's moon Europa has a salty subsurface ocean in contact with a rocky mantle. The ocean is populated by hydrothermal vents produced by tidal heating. Global heat flow is similar to ...
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How does the ecosystem of the Underdark/underground world work?

The Old Ones build continent-sized bunker complexes to protect themselves from the enemy, which followed through the cosmic ocean. The Hunter succeeded easily despite their efforts and their corpses ...
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Could a Flying Alien Species Develop Fire Usage?

I’ve got an intelligent, stone-age species that looks a bit like an Azhdarchid pterosaur. It is around the size of a large eagle. They have a proboscis and a finger on each wing used for manipulating ...
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How would Humans evolve to a natural predator? [closed]

Humans, along with several other species, evolved on a very fertile planet. Humans became the dominant species, found most commonly on the planet. They lived in peace for hundreds of years. Suddenly,...
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Tall trees : selective pressure

Thousands of years ago (approximately 12 000 years), a group of humans (let's call them First Group) reached out and settled in forests with huge trees (Tall trees : atmospheric pressure) which made ...
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Tree Shape on a Tidally Locked World

I'm designing a tidally locked world around a red dwarf star. The habitable ring is an Earth analogue. The atmosphere and gravity are similar to Earth's, and we're going to pretend the wind is ...
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Habitable Planet with Highly Eliptical Orbit

Would it be possible for life to develop on a planet with a highly elliptical orbit? (Similar to a comet, but possibly less extreme.) If so, what conditions would be necessary and what would the life ...
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Anatomically Correct Enderman [closed]

As a fan of some of the unique creatures of Minecraft and after looking at the Anatomically Correct Creeper, I was wondering would an Enderman be possible? Enderman Facts: They're from a game called ...
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1answer
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Feasibility of molluscoids [closed]

Once again going back to stellaris (a videogame by Paradox Interactive), I've gained enough inspiration to ask the question, “The feasibility of molluscoids”. Molluscoids are mollusks, and in the ...
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If humans were transplanted to a different Earth-like world that they didn't evolve on, how would they deduce how they came about?

I have a world where prehistoric humans were kidnapped and transported to another world. This other world is Earth-like, with mammals (also transported from Earth then later diversifying into other ...
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What sort of world would help prevent an intelligent species from discovering evolution?

I’m working on a first contact story set in the near future where an advanced alien species arrives at Earth and reveals itself to humanity, but is utterly baffled by the diversity of life that it ...
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What are possible energy carriers besides ATP?

I'm thinking about designing an alien race. The race is carbon-based and evolved on a world with an average surface temperature between 40 and 60 degrees Celsius. Now, on Earth, almost all lifeforms ...
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4answers
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How long would it take for an animal (feline, in this case) to evolve into a humanoid-type being?

The animal I'm particularly focusing on is a cat, for which I'm curious how long it would take for said cat to evolve into a bipedal, intelligent, humanoid being capable of complex language and all ...
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Why might the ability to attack using directed nerve stimulation evolve?

So, in my story, there is a species called the Telenoids. They have the ability to induce auditory nerve impulses so powerful they cause intense headaches and severe pain to nearby targeted non-...
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6answers
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How might humans evolve on other planets?

In my universe, humans were seeded on Earth by an advanced race. They were also seeded on other planets, notably Jupiter, Neptune, Venus, and some others in other star systems. They were given a large ...
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Could a humanoid alien species evolve to have a natural melanin deficiency but still have colourful skin/skin markings?

Summary at bottom. I have a character from a homemade alien species. The species has silver/white hair and blue/violet eyes. I know these are traits of a melanin deficiency, but I imagined her having ...
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Life without a bright star?

The main source of free energy that allowed life on Earth to develop was our sun. It bombards the planet’s surface with photons of high energy, which provide activation energy for reactions necessary ...
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Geckos walking on two legs

I was thinking of a situation, in which there is a mass extinction that wipes out all large land animals, and after this mass extinction some of the descendants of modern geckos evolve to fill the ...
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For what reason would insects grow in size over a long evolutionary period?

What possible evolutionary reasons would there be for insects to increase their physical size over a long period? What benefits would be gained by an insect being larger? For example, say ants ...
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4answers
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How would a cephalopod-like race breathe outside of water?

Real-life octopi can travel outside of water for awhile, but not permanently. My race is amphibious, living underwater primarily, but also coming up onto the surface if their environment becomes too ...
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5answers
324 views

What species has the most chance of becoming the next civilised species? [duplicate]

I'm considering creating a world which take place on earth after all humans are dead/gone (we don't care actually). In this situation another/some other species develop enough to be a civilization. ...
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Bryophitic Plants in an Underwater Forest

By "bryophitic", I mean "non-vascular land plants", being the liverworts and the mosses. (Hornworts are comparative latecomers, so we won't be talking about them.) Without vascular tissues, these ...
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3answers
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Anatomically correct Kryptonian, part 1

Part of the Anatomically Correct series of questions. Due to the nature of Superman having so many different powers, I wanted to focus specifically on one aspect of his character: the ability to be ...
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15answers
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If I have an Earth-like world with Earth-like fauna, and I want brightly-colored mammals, what would be a realistic way of causing that to evolve?

On Earth, while birds and reptiles can be quite brightly colored, it's rare for mammals to have any bright colors, and the rare times they do, it's either just slightly different (like with orangutans)...
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The case of the sexist plant

Let's say we have a species of plant, that, for whatever reason, only wants to be pollenated by female pollinators. Maybe this gives some advantage to the plant and/or pollinator. Why would a plant ...
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Would it be possible for species to become sapient without using tools?

Set in a parallel universe, in a galaxy far far away, an Earth-like planet orbiting a yellow dwarf star with the mass of 1 solar mass. And yes, indeed that planet comes with a natural satellite that ...
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2answers
191 views

Adult-sized alien child and child-sized alien adult

I was reading this question, and it made me wonder if something like this is possible or not. So, the question is, Is it possible to have an alien species in whom, the newborns are bigger than adults ...
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How would humans live in a world made primarily of glass?

Setup: Earth developed in an alternate universe with small oceans and little water. A little before animals first left the oceans and began to walk on land, when all of Earth's land was barren sand, ...
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Anatomically Correct Ettin

I'm fairly certain such a creature is impossible, but I was curious to see if anyone could come up with an explanation for such a creature. How would a two-headed giant evolve/function if it was a ...
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Would living on around Alpha Centauri change how our eyes see color?

I am writing a sci fi novel in which one of the primary factions is a lost space colony sent to Proxima Centauri (Alpha Centauri C) roughly 350 years prior on a generation ship. The trip took roughly ...
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3answers
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Could a land vertebrate re-evolve gills after moving back into the water?

I know there are examples of land vertebrates moving back into the oceans, such as in the case of whales, and marine reptiles, but in every case that I know of when a land vertebrate moves back into ...
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Designing flora: placing herbs

So I have noticed that most herbs come from the Mediterranean as confirmed by this site and those that do not often come from either actual Mediterranean climates or somewhat arid ones. So my ...
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278 views

Can insects evolve their basic anatomy to grow in size?

In my fantasy world, there are several species - both sapient and non-sapient. They all originally evolved from a group of insects that, after millions of years of isolation and no competition, have ...
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1answer
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Sleep Cycles on very fast and very slow rotating worlds Part 1

Related previous question. How would sleep cycles work on planets with day-night cycles greater than 48 hours or less than 6 hours? This part is primarily for wildlife that evolved there. Native ...
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Anatomically Correct Color-Adjustable Eye

I'm providing an interesting twist on the Anatomically Correct series by focusing on a single body part instead of an entire organism. The following image depicts the average range of the cones of a ...
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1answer
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Does day length determine metabolism?

Would an organism that evolved on a world with a short day length have a faster metabolism in comparison to one that evolved on a slower rotating world?
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What kind of environment would a proto-human have to be in to evolve into the following type of species?

Let's say that around 4-5 million years ago, members of the earliest proto-humans, maybe Australopithecus, get whisked away to another habitable planet/parallel dimension - doesn't matter how at this ...
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1answer
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Anatomically Correct Dancing Brooms

Consider the following GIF: The brooms from this Fantasia scene are always busy. They dance around energetically in a military-like march, never stopping to rest. When their wizard overlord is on ...
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5answers
806 views

A logical reason for humans to turn into dwarves/gnomes?

I am creating a fantasy world where on one continent there are humans, dwarves and gnomes. All 'species' can interbreed (much like Neanderthals and Homo Sapiens), thus they need to have close similar ...
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What does the anatomy of a fairy (10-20 inches tall, flying humanoid being) look like, as evolved from a regular human being? [duplicate]

There are many questions and answers regarding giants and how to scale up human anatomy on this website. (larger bones, better lungs and heart, lower body temperature, tighter skin at the feet, etc...)...
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1answer
87 views

Convergent Evolution of Polycephalic (Multi-Headed) Organisms [closed]

In my fantasy story, various two- and three-headed creatures have evolved from past magical experiments. For this question assume that: Although originally created in experiments, they can breed and ...
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3answers
184 views

Plausibility of only two cultures/peoples existing on one planet?

On Earth, it's virtually impossible to enumerate all the different cultures and ethnicities that exist, but if you hypothetically categorized every people as occurring with a language, that's roughly ...