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Q&A What would transhumans developed to live on dark, cold planets look like

I'm envisioning a setting in which human beings have altered themselves significantly to be able to live on alien worlds without significant terraforming. One type of transhuman needed would be on...

5 answers  ·  posted 5y ago by Locaq‭  ·  last activity 5y ago by Locaq‭

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Q&A How long can 400 people survive in an underground facility if they had to seal off their heat vents?

Assume the surface of the planet is experiencing ice age conditions and the facility was designed to keep the occupants alive for 6 months. An emergency forces the permanent closure of all Heating...

2 answers  ·  posted 5y ago by Pentallion‭  ·  last activity 5y ago by Pentallion‭

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Q&A Armor design for bird people? | Gliding

So, there are birdpeople/birdfolk in my setting. They're ~170 cm tall bipedal humanoids with a pair of functioning wings, slightly below the shoulders. They're covered with feathers, except for the...

5 answers  ·  posted 5y ago by Mephistopheles‭  ·  last activity 5y ago by Mephistopheles‭

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Q&A Can birds evolve without trees?

I wonder whether the birds or other flying animals heavier than air could evolve without trees of other protruding objects?

6 answers  ·  posted 5y ago by Anixx‭  ·  last activity 5y ago by Anixx‭

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Q&A Steam powered space generators

At 260 Fahrenheit in the Sun between Mars and Earth and -280 F in the shade could 2 large tanks rotate slowly in and out of its own shade to transfer steam backwards and forwards past a turbine?

4 answers  ·  posted 5y ago by Muze the good Troll.‭  ·  last activity 5y ago by Muze the good Troll.‭

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Q&A Electricity without electrons

The universe so far: If charged lepton fields are eliminated from the universe, charged pions become stable (having no decay path that preserves charge), replacing electrons to form bound "atomic"...

1 answer  ·  posted 5y ago by Logan R. Kearsley‭  ·  last activity 5y ago by Logan R. Kearsley‭

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Q&A The North Star in the ancient world sky

Question: Would a modern-day teen, trained in using the north star for directions when camping/hiking, notice a difference in how the "north star" (Polaris) works when transported suddenly to 1350 ...

2 answers  ·  posted 5y ago by Cyn‭  ·  last activity 5y ago by Cyn‭

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Q&A Can a machine benefit from stored heat energy?

Setting Overview My world suffers from an abundance of a particular type of energy. This energy can be safely absorbed and utilized by living cells, enabling, for example, a dragon's flight and fi...

6 answers  ·  posted 5y ago by Frostfyre‭  ·  last activity 5y ago by Frostfyre‭

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Q&A World with dodecahedron-shaped trees

Premise I was inspired by Karl Niklas who used computer modeling to simulate the ideal structure for a tree when different traits were favored. Here is a chart summarizing his work: Explanation...

6 answers  ·  posted 5y ago by Arash Howaida‭  ·  last activity 5y ago by Arash Howaida‭

Question evolution flora
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Q&A How could a small civilization move about normally, tactically, and quickly in a large swamp?

This is a small civilization (more than just a town or two) almost under the shadow of the regional hegemon. The dominant civilization knows they are there, but don't go too deep into that swamp be...

3 answers  ·  posted 5y ago by MacIsaac‭  ·  last activity 5y ago by MacIsaac‭

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Q&A Scientifically accurate fuel for a small spaceship

I'm designing a small two-person spaceship for use in battles in space. It is set around the year 2100. It would be around the size of a tank (approx. 50 tons). It would need to be fast and easy ...

6 answers  ·  posted 5y ago by Finn E‭  ·  last activity 5y ago by Finn E‭

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Q&A What could cause a planet to be in shadow for a 6 earth month period every couple of earth years?

My previous question ruled out having a moon orbiting a gas giant. I've got an interesting ecosystem (my bad, biome was the wrong word) that evolved based upon the idea that the world is eclipsed ...

2 answers  ·  posted 5y ago by Pentallion‭  ·  last activity 5y ago by Pentallion‭

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Q&A How close to the Sun would you have to be to hear it?

Taken from this fascinating answer: The Sun is immensely loud. The surface generates thousands to tens of thousands of watts of sound power for every square meter. That's something like 10x...

2 answers  ·  posted 5y ago by Jimmery‭  ·  last activity 5y ago by Jimmery‭

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Q&A Realistic Interstellar Energy Transfer

I've been reading some of the excellent answers on this question about galactic empires and it led me to imagine a reasonably realistic multi-system 'empire' might keep most or all of its populatio...

2 answers  ·  posted 5y ago by 666lumberjack‭  ·  last activity 5y ago by 666lumberjack‭

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Q&A Is it possible to calculate how long a moon takes to orbit a gas giant?

if it takes the moon 6 months to pass through the gas giants shadow? Assume it is distant enough to not be tidally locked. The gas giant is 112.5 AU from the star. The star is 55 solar masses. ...

1 answer  ·  posted 5y ago by Pentallion‭  ·  last activity 5y ago by Pentallion‭

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Q&A Humanity with the Ears of a Fox--What Differs as a Result?

In this question, we're looking at a humanity that has adapted one of the most conspicuous ways of keeping cool--larger ears. Desert animals usually have larger ears to have more room for blood ca...

2 answers  ·  posted 5y ago by JohnWDailey‭  ·  last activity 5y ago by JohnWDailey‭

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Q&A A planet illuminated by a black hole?

Is it possible for a planet to be heated and illuminated by a black hole due to Hawking radiation at the same intensity as by a star? What mass and size should a black hole have to produce the sam...

4 answers  ·  posted 5y ago by Anixx‭  ·  last activity 5y ago by Anixx‭

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Q&A Can you prevent a star from dying with infinite energy?

In my story, an advanced alien civilization that can travel to other universes has created an infinite energy source, named "an amvelian core". This core resembles a small sphere in appearance (abo...

3 answers  ·  posted 5y ago by Johnara‭  ·  last activity 5y ago by Johnara‭

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Q&A How would a very old biosphere differ from Earth's "young" one?

On my world, the equivalent of the Cambrian/Avalon explosion happened 5 byr (2 byr after formation) ago as opposed to 0.5 byr ago on Earth. The planets rough parameters are: mass between 0.4 and...

2 answers  ·  posted 5y ago by TheDyingOfLight‭  ·  last activity 5y ago by TheDyingOfLight‭

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Q&A Questions about sick trees in wood

I want to write a piece of fiction about a female tree caretaker who researches a small group of beeches in a wood. When she arrives, she sees that the trees are dried out. Is it realistic to say ...

1 answer  ·  posted 5y ago by Luna Levina‭  ·  last activity 5y ago by Luna Levina‭

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Q&A In a 'Zootopia' situation who's in power, the Elephant or the Mouse?

Imagine a situation kind of like Zootopia with many different creatures all living in one environment, some significantly larger than others. These species aren't necessarily furries like in Zooto...

5 answers  ·  posted 5y ago by dsollen‭  ·  last activity 5y ago by dsollen‭

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Q&A Does my climate map work?

I'm looking for notes on my climate map for a continent I've mapped out. Does this set up seem plausible. Map (Imgur) [3 Previous question with general planetary conditions edit Don't have t...

1 answer  ·  posted 5y ago by Brizzy‭  ·  last activity 5y ago by Brizzy‭

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Q&A How could I scientifically explain a world with day/night cycle only on the equator?

I'd like to build a world that has one pole where it's constantly day (all year long) and the weather is very hot, and one where it's constantly night (all year long) and the weather is freezing. ...

3 answers  ·  posted 5y ago by Mr_Bober‭  ·  last activity 5y ago by Mr_Bober‭

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Q&A When will the last unambiguous evidence of mankind disappear?

Humanity just disappears tomorrow, let's say it is like the Thanos-snap but it kills everyone. How long until the last unambiguous evidence of our existence disappears? What was this last relic? Th...

12 answers  ·  posted 5y ago by TheDyingOfLight‭  ·  last activity 5y ago by TheDyingOfLight‭

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Q&A Gas Giant with solid surface

I have the feeling the answer to this will come down to ''impossible'' but let's ask anyway to be sure. We know gas Giants have no solid surface and if you tried to land on one you would fall int...

3 answers  ·  posted 5y ago by Blue Devil‭  ·  last activity 5y ago by Blue Devil‭