Questions tagged [life]

For questions about the characteristics of living beings in different settings. This tag is not for questions about the daily life of characters.

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2answers
59 views

Would soil alone be able to provide everything that's needed to feed the development of an animal body without in-between edibles?

The setting features biomancers, mages who are like necromancers in that their magic revolves mainly around the use and obtaining or creation of minions or servants or the modification of said ...
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3answers
791 views

What if all life disappeared from the earth?

What if all life (plants, animals, bacteria, fungi, and everything from the smallest cell to the largest whale) disappeared instantly? And here I don't mean things related to the disappearance of ...
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4answers
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Is an almost entirely water-based planet stable enough to stay as a planet for long enough for complex life to form?

Imagine an earth mass that consists purely and entirely of water that orbits a star similar to ours at a similar orbital distance to Mars(or whatever distance would be sufficient for the planet to ...
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4answers
624 views

Too much oxygen and not enough carbon

If a planet has a lot of oxygen to support mega flora and fauna, how much would be too much? My planet has the oxygen content about that of the carboniferous(as a starter example), which had a about ...
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1answer
94 views

Indicators of Ai Super Intelligence [closed]

Given the certain state of Ai, what indicators would show some level of ‘Super Intelligence’? Here are some of my ideas of 'Super Intelligence' this is subjective, of course. Able to operate on ...
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4answers
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Realistic reverse aging?

More than a few times in fiction they've had a sentient species age in reverse, as in the children look like adults and the adults like little children. My question is how could this trait be ...
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54 views

Biosolvents for Life

What biosolvents could, in theory, permit the emergence of life on other worlds? I have been recently looking through possible biosolvents and I have found a good number, but I am specifically looking ...
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1answer
75 views

Synthetic hydro carbon based Life

This question includes Genuine Artificial intelligence as life so long as it is self replicating and sapient. Hard science only please. Can a sapient self replicating entity be designed to exclusively ...
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1answer
118 views

Scientific explanation for rainbow fire or sparks from a biological entity

I recently re-watched guardians of the galaxy vol.2, and the creature at the beginning could shoot rainbow colored fire. This got me thinking, (as in my spare time sometimes I like to just write a ...
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2answers
134 views

Would this planet be habitable for intelligent lifeforms

I am trying to make a universe using math and this is a planet from the first solar system I am making. Firstly the star. This star, which I don't have a name for, has a mass of 1.3 solar masses, a ...
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6answers
570 views

How long can a vampire live?

Okay, say I have a castle with a single vampire living in it. They need to drink the blood of 5 humans per day to survive, but they can substitute with animal blood, or by taking small amounts from ...
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1answer
197 views

How would the ocean smell if there were no life in it?

My characters are on a planet with no life that somehow has a weakly breathable atmosphere. They're on a beach and they note the smell. This is salt water so maybe the smell is different from, say, a ...
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How can I change Earth to become like Mars?

Earth has its own current population, 7 billions individuals or so. Everything is going great: there are animals, rivers, houses and factories. The world as we know it (without pandemic!). One day ...
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2answers
175 views

Is This Living Planet Plausible?

My idea is an planet that is one living organism wrapped all around an rocky foundation. It orbits an sun of one solar mass, and has an Earthlike radius. Its albedo is about 20%, so it gets 1098.4 W/m^...
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6answers
151 views

How will resurrection affect inheritance law? [closed]

In our world, but in the future, humans have just discovered a technology that will resurrect any person for which a sample of DNA can be obtained. Now, for the first time, some people have been ...
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3answers
230 views

Oceans of sugar?

Simple/Vague question but what would it take to have a world that oceans aren't salty but sweet? Oceans full of sugar is that even possible?. Also secondary question could life survive in the water?
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Tropical Moon Orbiting Gas Giant [duplicate]

I am asking this question, “How would it be possible for the moon of a gas giant to naturally be habitable for human life?” Specifically, I’m looking at these criteria: Has a tropical climate with ...
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3answers
247 views

Can two distinct large isolated life pockets on the planet evolve independently and then merge without driving one another to extinction?

In the geological history of my planet, the plate tectonics resulted in the assembly of a kind of "ring supercontinent", that completely encircled a portion of the ocean and isolated it from ...
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2answers
213 views

A bacterial organism that survives on the surface of Venus

Yes, you read the title right. Naturally this cannot be DNA/RNA based, the highest temperature organisms have survived as we know it is 122 degrees celsius and Venus surface is 4 times hotter on ...
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1answer
166 views

What systems would be needed to keep two halves of a spaceship viable for humans?

A large space colony transport ship (100 colonists) set off for Europa to populate a colony recently built by drones (near future, the 2070s). The six-year flight was going well until unidentified ...
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0answers
48 views

Life und a Double Planet System [closed]

i am currently working on a CG Short for my Portfolio. It takes place in a Binary system and just tells the Story of a Pilot on one of the Planets. Anyways, my question for today is how we could ...
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7answers
526 views

How can we avoid the evolution of inductive reasoning?

Inductive reasoning is one of our most powerful thinking tools as humans. It allows us to find patterns in what we observe and generalize these patterns to predict what will happen in the future. Even ...
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1answer
281 views

The Earth is our Moon - A Reality check for a Binary Planet System [closed]

This question is connected to another one I asked about Interstellar Transport Vehicles, but more concerned about what we could expect from a Binary Planet System. So I want to talk about a few major ...
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2answers
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How would multicellular organisms evolve in a microgravity ocean?

How would living organisms develop/evolve in a very-low g ocean environment? The environment would be a small radioactive core surrounded by a small mass of water, less than 100 km in diameter, in the ...
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The cruel life-cycle of biscuits (cookies)

Captain's Log For some time we have been monitoring broadcasts from a planet that calls itself "Earth". We have noticed that it is fond of placing short documentaries in slots between the ...
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1answer
136 views

How would plasma-based lifeforms interact with physical matter?

I believe that I had previously wrote about the possibility of energy beings, although it seems that them being made of neutrinos is right out. So I instead thought of them being made of plasma. Some ...
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2answers
164 views

Is Oxygen necessary for the Sulfur Cycle?

I know that part of the Sulfur cycle requires elemental Sulfur to be oxidized. Every example I've found uses Oxygen and becomes some combination such as Sulfur Trioxide or Disulfur Trioxide. If other ...
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1answer
80 views

Could complex Precambrian life be possible?

I have a really good question. Could it be possible for complex life to have existed in the Precambrian? I’m aware that only the fossilized remains of bacteria have been discovered from that time ...
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3answers
729 views

Would scanning solar systems/planets for carbon concentrations be a viable way to search for alien life?

Working on a story about a crew of astronauts on a mission searching for evidence of alien life, either still living or long extinct. Not a biologist or chemist, but from my elementary understanding I ...
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2answers
121 views

How to plausibly reanimate a person?

What hypothetical scientific procedure could be used to reanimate someone who is brain dead. I am aware that it is possible to bring someone back if they are clinically dead which is where a vital ...
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2answers
161 views

Bending bones like metal bars

Any person who was once a stupid teen knows how it feels to break a bone and be stupid enough to pretend like nothing happened to hide the injury for weeks on end until their parents notice.... It is ...
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1answer
85 views

Lifespan of Plutonians [closed]

Honestly, I think my questions about a fictional Pluto are by far the interesting to me, so I have another question. Now that I’ve got my humanoids pinned down, and what protects them from the cold, ...
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5answers
297 views

In what way would a regenerating undead be "undead"?

We all know an undead is a reanimated corpse, something rotten and decomposing yet still animated. Normally an undead (if made of flesh) will have an expiration date after which it won't be able to ...
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2answers
148 views

Could life generate twice on a planet using slightly different materials?

Extremely low possibility, but if life synthesizes from scratch after life has existed on a planet for a few million years, would the two separate lineages be able to co-exist?
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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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2answers
1k views

Could bacteria survive on a star?

If the right requirements are met, could bacteria survive on the Sun? The bacteria would spend most of their time in hibernation and reproducing, and when the time comes, they spread out on plasma ...
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3answers
250 views

Living machines. At which point can machines be considered a life form or organic?

I found this definition of life. Life is a thing that can adapt to its environment, grow and replicate. But mechanical, electrical, and electro-mechanical machines are never called alive. People ...
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212 views

What would life be if humans had a healing factor? [closed]

The main premise is that since homo sapiens evolved, humanity has possessed a healing factor similar to wolverine, but lesser. How would modern-day life be different?
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1answer
123 views

I'm building a fantasy world with three large moons and orbiting a distant sun. I need help with the following: [closed]

1 - What might the days and nights be like, in terms of comparative temperatures and length, with three moons gravity and a massive orbit?
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3answers
187 views

Reason/Mechanism for seemingly randomly lengthened lifespans in characters in a roughly viking-age world [closed]

So here's the deal. I'm working with the idea that in my world, people can have very different lifespans. Most people live a normal lifespan - the book is set in a fantasy world roughly equivalent to ...
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1answer
192 views

Plausibility of Hexapodal Aerial Megafauna

How plausible is a six-limbed flying animal roughly the size of hatzegopteryx to be aerial? In this case, an aerial animal will be defined as a creature that solely inhabits the sky. I will call the ...
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2answers
145 views

How long until land life can return after the impact?

So, it finally happened. The Earth was hit by a comet, and anyone outside of a research station at the bottom of the Atlantic is now dead, or dying. So, here's what we need to know: How big would a ...
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2answers
267 views

Hanging World - Trees

Scenario A civilization is living on an ancient super structure, they don't know much about it, they just live there and have lived there for as long as they know. For our current situation we can ...
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1answer
132 views

Environment/Ecosystem for a "Sunfall" colony

I've read a lot of posts about moons around large gas giants and I think I have fairly good idea about basics to them. I'm not super great with all the science parts myself but they give me lots of ...
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2answers
312 views

If humans evolved on Mars instead of Earth, how quickly would we have detected life on Earth?

Suppose that both Earth and Mars was booming with life in a similar way. Except that, on Earth, there was no hominid family, and no humans evolved. Instead, humans evolved on Mars. Assuming we had ...
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2answers
914 views

How Would Ammonia-Based Life Evolve? [closed]

EDIT: The planet/moon has a high mass, and has a similar atmosphere to Jupiter or Saturn. These organisms will be silicon-ammonia based, and breathe hydrogen. There will be very little oxygen in the ...
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5answers
217 views

Adapting to a sonic world

A planet much like Earth orbits a star much like the Sun, but with one difference: the energy from the star is magically transformed into sound within the planet's atmosphere. There is no longer ...
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2answers
192 views

Algae using UV light from auroras for photosynthesis

I was reading some questions on Quora and I found this claim: The polar regions have a very odd reason for them to have so much oxygen production. You see the Polar aurora run day and night in the ...
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5answers
175 views

Planetary neighbors

Let's say there is another planet in our solar system that harbours sentient life and this sentient life can build castles, buildings, and other such structures. When would we notice that? We can ...
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1answer
130 views

How much of our solar system can you change without breaking the science of life on earth? [closed]

I am making a near-future setting that takes place in an alternate solar system that's similar to ours (one planet with life, a moon, and other planets without life and their associated moons). And ...