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[Question] [ Obviously the greater a planet's gravity, the stronger the material of the space elevator's cable would need to be in order to support its own weight. However, doesn't greater rotation speed reduce an elevator's required length by increasing centrifugal force? Absolutely massive super-Earths are probably...
[Question] [ I'm considering making a novel about something weird that really happened sort of: an island that was on every map of the world, but never really existed. The real deal is called a Phantom Island, and the one that snagged my attention is called [Sandy Island of New Caledonia](http://en.wikipedia.org/wiki...
[Question] [ **Technical question warning !** I'm trying to figure out the size of countries and continents but there is something I do not understand. The map I'm using was made with the equirectangular projection (its width is twice as large as its height). I converted the file with G projector into a mollweide pro...
[Question] [ **Closed**. This question needs to be more [focused](/help/closed-questions). It is not currently accepting answers. --- **Want to improve this question?** Update the question so it focuses on one problem only by [editing this post](/posts/5/edit). Closed 9 years ago. [Improve this question](/posts/5...
[Question] [ In this world there are humans have developed the technology to allow for interstellar travel, accomplished by light speed engines. However, this has created a problem. Is there any way for those who live on the vastly different planets can stay genetically similar to humans on Earth? Conditioning like p...
[Question] [ In my works, there’s an Earth-like planet known as Lyrial which is linked to Earth and is home to a species of Dragons that’s meant to be scientifically plausible. Additionally, another planet, Ozarvis 32, is home to a much more Magical species of Dragons, but that’s beside the point for two reasons: The...
[Question] [ In nature we see natural pattern formations when a material forms an organised structure within a less dense material in order to fill the space in the most efficient form. Such as hexagonal and octagonal formations in clouds and surface bubbles on water. My question is based on the natural formation of ...
[Question] [ Long ago, Prime Minister Bob created the [insert name here], a government organizing Space in a peaceful, lawful, and orderly way. This story is taught in classrooms around the [insert name here], because there is one difference between the forming of the [insert name here] and other powers in this galax...
[Question] [ There is a field of grass that is so green and fresh and untouched by the grazing of animals. Throughout the entire day it glistens in the sun as if it is still covered in the morning dew. But beware, young shepherd, for that pasture is mighty treacherous and will cut you if you so much as dare step on i...
[Question] [ I'm writing a system where the moon is always full from the perspective of the Earth-type planet--it does not go through phases. Short of the moon itself being luminous, what would it take for this to be naturally possible? [Answer] # [Planetshine](https://en.wikipedia.org/wiki/Planetshine) A special ...
[Question] [ Often, aquatic humanoids and other species are depicted with a set of shark-like gills in the side of their chest. Specifically, the gills and gill arches would replace the lungs and ribcage under the level of the armpits Could this peculiar structure realistically develop in an embryo using the normal m...
[Question] [ Many species arise from evolution, but as in many fantasy works the creatures are created by gods, titans or something similar, so I think this gives a certain freedom to create creatures with fantastic characteristics, but that are scientifically plausible. Thinking about it, I would like to know: **can...
[Question] [ In this scenario, there is a rocky planet that is 230% the width of our Earth, covering a total area of a billion square miles, 55% of which consists of three continents separated by a single ocean that averages in at less than one mile. However, what really makes this stand out is that the core is light...
[Question] [ How would humans or an advanced civilization control earthquakes and volcanoes and even, if possible, harness their energy? By control, we mean the ability to stop or trigger or accelerate or dampen quakes and volcanic eruptions, etc. The technology is not limited to modern-day technologies. Eg: can ball...
[Question] [ Premise: A generation spaceship leaves Earth around the year 2060 on a journey to colonize Alpha Centauri A (ACA). In this fiction, fusion power is achieved in 2040, improved over 20 years, and used within the solar system. The trip to ACA will take 110 years. The ship will accelerate halfway, flip, and ...
[Question] [ The magic system of Second Earth boils down to "micromachines doing stuff". Of course, there are many layers of complexity to it. These micromachines are produced in the bodies of sapient creatures and are subservient to them. However, I ran into a small issue while developing the concept: communication....
[Question] [ **Real life** It is a biological fact that wombat faeces are approximately cube shaped. [Wombat poop: Scientists reveal mystery behind cube-shaped droppings](https://www.bbc.co.uk/news/world-australia-46258616) [![enter image description here](https://i.stack.imgur.com/AW7Sw.png)](https://i.stack.imgur.c...
[Question] [ I watched a video or read some article recently on the reality of **Attack on Titan's 3D maneuvering gear** (very sorry, but I can't find it) and how it would kill the user easily. Basically, even with the harnesses that the survey corps use to redistribute weight to the legs and torso, any movement that...
[Question] [ In this case, Nymphs means not immature insects but beings born of the life force of nature itself. When magic entered this world from an alternate universe, that magical essence combined with the built-up residual life force all over the Earth. (This assumes A) that every living thing has a soul and B) ...
[Question] [ The philacry are humans with wings like dragonflies, crystal clear and barely weighing anything, yet able to withstand the rapid wingbeats of flight. Though they can fly from childhood, buzzing about with some of the dexterity of dragonflies, this takes a lot of energy, and a lot of oxygen, leading to th...
[Question] [ An unmanned, AI-controlled, terraforming ship arrives at an earth-like planet (i.e earth-sized, rocky, in the goldilocks zone of its star). Unfortunately for the ship's terraforming plans, the planet is tidally-locked, has no [magnetosphere](https://en.wikipedia.org/wiki/Magnetosphere) and so is at the m...
[Question] [ I have a world with late 19th-century steampunk technology. The major nations are at war, and one of them has depleted a lot of its manpower. I thought that they could try to design automated artillery which uses pistons, clockwork and steam-power to reload itself and shoot. Only one or two artillerymen ...
[Question] [ I am writing a novel that involves a person born every few hundred years with the ability to tame animals. The other people never learn their secret. What could I do to make sure that the others never learn how to? Here is some information, in case it helps. * The power is not true domestication, just ta...
[Question] [ Context is an alternate reality where at some point in time, one large tunnel appears on Earth. Both ends of this tunnel are 100m above sea level, respectively located at most eastern equatorial point of Africa, and most western equatorial point of Africa. The tunnel does not follow Earth's curvature. It...
[Question] [ **Closed.** This question is [off-topic](/help/closed-questions). It is not currently accepting answers. --- You are asking questions about a story set in a world instead of about building a world. For more information, see [Why is my question "Too Story Based" and how do I get it opened?](https://w...
[Question] [ So I’ve had this idea cooking in the background of my mind for a year now, and I’ve never made it work. Simply put, a bee has two pairs of wings, but is commonly drawn with one because the two move in unison due to a row of hooks attaching the back of the forewing to the front of the hind wing. [![bee wi...
[Question] [ I need a species of goat with horns that inject venom into you. How can I pull this off realistically? You see, I hate unrealistic things, so to have my venomous goats from hell be unreasonable would kill me! They need to attack people because they have claimed human’s territory and attack and hump child...
[Question] [ Allow me to introduce to you the epaulette shark: [![enter image description here](https://i.stack.imgur.com/5WQqD.jpg)](https://i.stack.imgur.com/5WQqD.jpg) This one species stands out over the other 511 in that it can breathe out of water. How? It actually has several adaptations: 1. They slow down the...
[Question] [ So, in my world, about 90% of the animals in North America went extinct. The only surviving creatures are a few livestock animals, rats, insects, humans, and three remaining reptiles: Trihorners, Snakes, and, the important one for this question, **Geckos.** You see, these Geckos are different from the or...
[Question] [ **Premise 1:** I prefer to know if it's possible to realize this without much handwaving (hence the *science-based* tag) but, as this is going to be in a fantasy setting, answers which make it possible with just a couple little details explained by magic (e.g. the mesa is largely composed of handwavite c...
[Question] [ Let's say you have a planet(about the size of Earth) where the core of a planet has gone cold for whatever reason. So the planet is basically just a barren rock devoid of atmosphere or electromagnetic field. Could you dig to the center of that planet and build a city/base there? Would the pressure of the...
[Question] [ In my story's world, the planet is roughly Earthlike in terms of size but it has three moons. I have written in something called "brightnight", when all three moons are full at the same time and the light is almost as bright as day. One month is defined as the time it takes for all 3 moons to have done a...
[Question] [ This is not so much for a story as much as something I’ve been thinking about for a while. I’m really drawn to the idea of a sort of world that exists on a server somewhere. The ‘gods’ that eventually create the world are just AIs trapped in a black box. Now the AI has no means of interacting with the w...
[Question] [ A hypothetical scenario I'm batting around in my head is a Habitable Gas Giant system consisting of a roughly Saturn sized body orbiting a sun like star at a comfy goldilocks zone distance. Orbiting this planet are two Massive moons, one roughly 70-80% the mass of the earth and the other between 20-30% o...
[Question] [ My world is a satellite of a gas giant. It has an atmosphere and is mostly covered by water (the percentage of water to its surface is somewhere in the high 80s-low 90s). Its rotation period is 28 days resulting in roughly 14 days of sunlight followed by 14 days of night (dawn and dusk included). This w...
[Question] [ **This question already has answers here**: [Science behind a naturally invisible creature](/questions/10508/science-behind-a-naturally-invisible-creature) (8 answers) Closed 4 months ago. This is a post-apocalyptic setting I'm working on. The world has been overrun by invisible monsters from anot...
[Question] [ Firstly, Allow me to apologize if this is not relevant on on topic for this stack exchange, but I'm at a loss here and hope someone can help. I have created a rough map for my world using Krita (Similar to Gimp) which i use for internal reference while doing other world building. What I am looking for is...
[Question] [ **TL;DR:** In a fantasy world full of magic, i want the elemental forms of magic to be strong against one another in a symmetrical way (meaning every element has the same amount of weaknesses and strengths). I do not specify how many strengths and weaknesses they should have, even though i would be happy...
[Question] [ Sulfur hexafluoride is [pretty awesome](https://www.youtube.com/watch?v=u19QfJWI1oQ). It is a gas six times denser than regular air, and thus you can actually make tinfoil "boats" float on it. It also makes your voice deep when you breathe it in. Let's have a sea of it. To prevent [the entire planet from...
[Question] [ If wizards had to draw energy from their bodies, using only existing biological processes and bound to vanilla human metabolism rates, how would they be inclined to maintain their bodies and diets to adapt for different situations? ## Source of magic Magic is produced by an organ located in the pelvis, w...
[Question] [ The dragon can achieve mach 1.5 in level flight and can achieve mach 2 in a dive. It likes to hunt its prey through use of kinetic energy like a Peregrine falcon. My theories: The dragon can repurpose its fire breath to come out of its rear, sort of like an afterburner. [Answer] The fastest bird is...
[Question] [ The larger an animal, the harder it is to cool down. Ignoring the problem of bone/muscle strength vs size/weight and saying an animal could get to outlandish sizes, would a second cardiovascular system specifically for thermoregulation help it regulate its core body temperature? What would the fluid in q...
[Question] [ I've tried to find relevant sources to make this question more informed, but haven't had any luck. It just seems implausible to me that a humanoid with long and pointy canines could bite a victim in the neck, hit the jugular vein in two places with those same teeth, drink the blood either through hollow ...
[Question] [ So, there are creatures with insane regenerative abilities, like casually putting their severed head back on their neck and it's fixed in mere seconds. The reason for that is that it's not true regeneration. These creatures are made of a fluid, so if any part falls of or gets damaged, it can quickly be m...
[Question] [ In my story, a ship is built in orbit around Earth, designed for a 20-person scientific expedition to a planet 11.4 ly away. It will accelerate at 1g for half the distance, then flip around and accelerate at 1g in the opposite direction until it comes to a stop. It's not designed to ever enter an atmosph...
[Question] [ I understand, vaguely, how human voices vary with the overall size/shape of the individual(s vocal chords), and I can use that to make reasonable assumptions about what the voice of non-human fantasy race of oversized (giants), or undersized (gnomes, fairies, etc.) humanoid race might sound like compared...
[Question] [ **This question already has answers here**: [What would be the tallest possible height for humanlike creatures in earthlike conditions?](/questions/51686/what-would-be-the-tallest-possible-height-for-humanlike-creatures-in-earthlike-c) (5 answers) Closed 4 years ago. Say you have a giant, similar ...
[Question] [ I'm creating a large [ungulate](https://en.wikipedia.org/wiki/Ungulate) that is likely a part of the suborder Anclyopoda. Suspension of disbelief is expected, but there's a detail with the current design that's really bugging me. The creature is meant to be related to the [odd-toed ungulates](https://en...
[Question] [ During much of the Late Pleistocene stage, the world's most widespread biome was the so-called "mammoth steppe" - a cold, dry grassland which spanned eastward all the way from Spain to Canada. It was the favoured habitat of many iconic Pleistocene megafauna species. Roughly 12,000 years ago, the mammoth ...
[Question] [ This is based on the idea of a society where vampires are known and subsist off of 'willingly' given human blood. An average adult human needs approximately 2000 calories a day to maintain their weight, and so would a vampire. There are 900 calories per liter of blood, and about 5 liters of blood in the ...
[Question] [ I am working on a planet that has insignificant (almost 0 degrees) tilt, no moon, rotates twice as fast as Earth. I intend to create quite an exotic "biome", so to speak, in a subtropical desert zone which has toxic lakes of mercury. From what I understand, mercury evaporates rather slowly. Is it possibl...
[Question] [ Like many other writers, I'm hoping to create some sort of justification for destroying the monopoly firearms have on the modern combat scene so that I can justify mixing things up with melee weapons, archery, slower-than-bullet magic, etc. I'm hoping to do this by using my story's magic system to knock ...
[Question] [ So, whenever I see people or articles discuss the properties of the warp bubble surrounding an Alcubierre drive, there is always mention of extremely high (yet undefined) tidal forces. What I want to know, is what kind of tidal forces are we talking about exactly (we'll assume it's a 100m sphere sufficie...
[Question] [ **Closed**. This question needs to be more [focused](/help/closed-questions). It is not currently accepting answers. --- **Want to improve this question?** Update the question so it focuses on one problem only by [editing this post](/posts/128087/edit). Closed 5 years ago. [Improve this question](/po...
[Question] [ A rotating object, especially something as large as a planet or a star, has kinetic energy. However, my question is how would you go about harvesting the energy the object has from rotation to go towards other purposes such as powering several thousand space stations? I'm making a hard science fiction sh...
[Question] [ My planet is tidally locked to its sun. It has a slightly thicker atmosphere than Earth. Over the planet’s sun-side surface, there would be no wind because that area is in the middle of a big cyclone/anticyclone. (I'm not sure if that works yet.) The Aliens living there are using some sort of light glide...
[Question] [ I'm designing an alien plant soecies that has evolved to produce electric shocks, as a way to keep insects away from it. My question is, how would it produce electricity in the first place? Also, could such an energy source be extracted? Note: I've read about the way electric eels produce electricity, I'...
[Question] [ I've seen some cool art and scenes from the Cowboy Bebop which had trade lanes made up of what looks like large rings that accelerate and deccelerate a ship. I wanted to replicate a system like this for Warlords making use of the ITN (interplanetary transportation network). Now the actual idea I had woul...
[Question] [ "Polymorphism" is the name for when members of the same species exhibit different physical forms. The difference between male and female phenotype is an example of polymorphism in humans (and mammals/others). These differences are controlled by how chromosomes are inherited. Suppose we had a species whic...
[Question] [ From 56 to 34 million years ago, Earth was so warm that we have found evidence of jungle plants inside the Arctic Circle. Nowadays, jungles are confined in or near the equator, and those latitudes are dominated by only one type of wind--[the doldrums](https://en.wikipedia.org/wiki/Doldrums). > > The dol...
[Question] [ The Rygyphae are a species that lives in the geothermal pockets, areas heated by volcanic activity. The rest of the planet is nothing but frozen ice and rock, but these pockets are lush jungles full of thriving life. **Is this feasible? Do these geothermal pockets have everything they need for ecosystems...
[Question] [ The ships would be permanently extra planetary and manned by 4-5 crew. All life support water, food, oxygen and propulsion being produced by bacterial cultures (not necessarily the same). With all waste produced ($CO\_2$, grey water, waste/spoiled food, organic matter) being recycled through the system o...
[Question] [ Take the following family tree, which is meant to show individuals exhibiting in their phenotype a particular genetic trait. [![Family tree](https://i.stack.imgur.com/ayDZm.png)](https://i.stack.imgur.com/ayDZm.png) * White boxes (`A`, `B`, `C`, `D`, `E`, `F`, `J`, `K`) are unknown or undecided, and coul...
[Question] [ Far south-west of the main continent exists an island in a shape of crescent moon with dense jungles and slender mountain peaks and a single city named Kalt stands in a place where the islands' central lake opens to the sea. (large lagoon with a big river flowing into the sea) This city does not have any...
[Question] [ I'm currently in the midst of a trilogy of novels. The planet is a swamp world with $.87$ g's of gravity, no axial tilt, $15.12$ psi atmospheric pressure, and whose mass is $.92$ of Earth. Atmospheric composition: $74\%$ $CO\_2$, $20\%$ Methane, $5\%$ Nitrous Oxide, trace amounts of $O\_2$ and other gass...
[Question] [ Because I need a spine that works for massive and small creatures I'm thinking of making a plant-based spine (which has its own DNA). The spine acts kind of like a cucumber, in that when it sucks up more water it becomes sturdier, but when it loses water it becomes soft and malleable. A system of muscles...
[Question] [ Subangea is a giantic cave that stretches below the surface through endless cavities. From oil oceans to volcanic sinkholes and even upside-down forests, the environment is ever changing from one cavity to the other. So is the fauna except for one small detail, it is always trying to eat, dismember you o...
[Question] [ I think I have found a biological solution to prevent menopause. My Kepler Bb humanoids don't get more frail with old age so aging is not a cause of death for them. They can survive well past 100 years if the conditions are just right. Because of this, I figured "If they don't die of old age, what is the...
[Question] [ **Closed**. This question is [opinion-based](/help/closed-questions). It is not currently accepting answers. --- **Want to improve this question?** Update the question so it can be answered with facts and citations by [editing this post](/posts/70897/edit). Closed 6 years ago. [Improve this question]...
[Question] [ I am conflicted to ask this in the worldbuilding forum since it is based on The Matrix- BUT i am only using the CORE idea as I do not wish to use direct Matrix references. In the Matrix, a major plot line [SPOLIER!] is that humans are now enslaved due to losing the "Machine War". Due to prejudice towards...
[Question] [ Imagine a world much like Earth, except it is nearly tidally locked to its star, making a complete revolution every few thousand years. The planet is far enough away that there is a band of livable area ~300 hundred miles across. Everything on one side is scorching desert, everything on the other side is...
[Question] [ **This question asks for hard science.** All answers to this question should be backed up by equations, empirical evidence, scientific papers, other citations, etc. Answers that do not satisfy this requirement might be removed. See [the tag description](/tags/hard-science/info) for more information. I'm ...
[Question] [ **This question asks for hard science.** All answers to this question should be backed up by equations, empirical evidence, scientific papers, other citations, etc. Answers that do not satisfy this requirement might be removed. See [the tag description](/tags/hard-science/info) for more information. Let ...
[Question] [ I was wondering whether a planet might exist that has life forms with up to five sexes, with a single organism having three different and independent, functional sets of sexual organs. Presuming intelligent life develops on this planet, what type of social structure/roles may exist? [Answer] There's n...
[Question] [ Being inspired by the [lovely](http://4.bp.blogspot.com/-liTXylBO8t4/UZa4Yt0XMXI/AAAAAAAARYo/_nyIzdGGraA/s1600/Scott+Chambliss+Star+Trek+Into+Darkness+Nibiru+concept+art+2.jpg) [concept](http://1.bp.blogspot.com/-f1_U5hejGrc/UZa4avD4JXI/AAAAAAAARYw/CYVk4W4Lh4Q/s1600/Scott+Chambliss+Star+Trek+Into+Darknes...
[Question] [ A Type II civilization on the [Kardashev scale](https://en.wikipedia.org/wiki/Kardashev_scale) has decided to build a telescope. This civilization spans its home galaxy and wields vast energies capable of moving and shaping matter on the scale of solar masses. They have decided to use these powers to arr...
[Question] [ **This question asks for hard science.** All answers to this question should be backed up by equations, empirical evidence, scientific papers, other citations, etc. Answers that do not satisfy this requirement might be removed. See [the tag description](/tags/hard-science/info) for more information. I'm ...
[Question] [ In my universe, the Horn of Africa is the hub of magical and technological advancement before its downfall in approximately 1 BC. What would ancient merchant sailors eat on a third rate ship (think an [Indiaman](https://www.thefreedictionary.com/Indiaman)) while in transit from the Horn of Africa to the...
[Question] [ The Seven Years' War was arguably the most important war in the history of the United States of America. After all, the revolt begun in the then-British colonies was a result of taxes levied there by Britain, which were intended to pay the debts Britain had incurred as a result of the War. If, for some r...
[Question] [ So let's say that I have a world with a moon, you know kind of like we do on Earth. But with life on the planet, is it possible to find life on the moon? In the artifexian video on habitable moons, he suggests that they could only exist as moons of a gas giant, but gas giants are hard to justify life on....
[Question] [ How would just the weather be affected if there was huge mountain range between the Arctic and the mid latitudes of a planet? Roughly 50-60 degrees latitude. A little further south than Earth's Arctic circle at 66 degrees latitude. [![enter image description here](https://i.stack.imgur.com/YfjAt.jpg)](ht...
[Question] [ Imagine a world where human beings can be organically enhanced to peak physical strength/ speed/ agility and maybe even gain telekinetic abilities to some extent. This enhancement is caused by the (probably painful) bonding of an alien organism to its otherwise perfectly normal human host. My questions a...
[Question] [ [![enter image description here](https://i.stack.imgur.com/5usOH.jpg)](https://i.stack.imgur.com/5usOH.jpg) This is a skeleton of a titanosaur, not quite the longest of the dinosaurs, but most certainly the heaviest! As far as we have found, we'd found no species exceeding 75 tons. This post focuses on a...
[Question] [ Okay so in my world, I have two pre-industrial societies that live thousands of miles apart from each other on their ringworld. One lives in a desert climate similar to India or the Middle East while the other lives in a more Northern European climate, like England, Germany or Norway. I want to emphasize...
[Question] [ Let's say I have a species similar to human, as sort of New Humanity. The only thing that separates them from humanity is their subspecies: the Sublorans. They have multiple animalistic features that separate them from the other subspecies. Most of the features that separate them are easily explained exc...
[Question] [ In the world I am designing, the days last 9 years. The main problem I had was how life could have evolved on a world like this. An easy solution is to have the world start having 9 year days *after* life already evolved. I plan on doing this by having a rogue planet pass by, slowing the day length. Is t...
[Question] [ A volcanic island can obviously come into existence quite easily and swiftly by natural causes, as evidenced for instance by the appearance of [Surtsey](https://en.wikipedia.org/wiki/%20Surtsey) off the coast of Iceland. However, people have already drilled into magma chambers [by accident](http://news.b...
[Question] [ I have decided on my preferred method of zombie apocalypse. I have chosen super leeches. But I have run into some problems, I'm not entirely sure if such a thing would be possible. I have a few ideas. --- These leeches should feed off of blood. Human blood should be preferred, although I would be okay if...
[Question] [ **Definitions** > > Hamada: A type of desert landscape consisting of high, largely barren, > hard rocky plateaus, with very little sand because this has been > removed by deflation. -- From Wikipedia > > > Desert: A region defined by arid climate, little rainfall and supports > only sparse and wide...
[Question] [ I am aware of biological constraints to our size, such as the issues presented by Vsauce in this [video](https://www.youtube.com/watch?v=DkzQxw16G9w). However, letting the biological factors aside, what is the perfect size for a technologically advanced species? There are some benefits to being small: ma...
[Question] [ I have a planet with two moons. I want them on opposite sides during the equinoxes and together during the solstices. The seasons are a little lopsided, with spring and autumn having 90 days and the other seasons having 126 days. Thus, there are 108 days between equinox and solstice. What function would ...
[Question] [ What would the most advantageous alternate thumb orientation be? I.E. on the underside of the hand, in the middle of the wrist, or in between the fingers (replacing the middle finger). Would there be a strong advantage to having multiple opposible thumbs (i.e. one on each side of the fingers or even two ...
[Question] [ I've a creature that can focus CO2 laser through the len of the unique eyeball as means of self defense mechanism via natural selection. Now using the same natural selection process how can such creature prevent the laser from overheating the eye? Kindly use magic sparingly else face the wrath of my crea...
[Question] [ In this scenario, the American British Colonies never revolted against Great Britain. Therefore, GB still has many of its colonies. Now, imagine that it is 1938, and the Second World War is right around the corner. Germany is about to invade Poland, and Great Britain and France are about to declare war ...
[Question] [ If an Earth-like planet was tidally locked to a star similar to [Sirius A](https://en.wikipedia.org/wiki/Sirius), at which distance from the star would the night side be able to have liquid water, possibly with an average temperature of about 10ºC in the night side? [Answer] [See also Physics SE](http...
[Question] [ For this question lets take a trip to Slyo Dacas: [![enter image description here](https://i.stack.imgur.com/zaDiJ.jpg)](https://i.stack.imgur.com/zaDiJ.jpg) Slyo Dacas (sil-yo-dak-iss) is a world roughly the *same size of Earth* with a decent *magnetic field* and *no moons*. The world is a bit *drier t...
[Question] [ **This question asks for hard science.** All answers to this question should be backed up by equations, empirical evidence, scientific papers, other citations, etc. Answers that do not satisfy this requirement might be removed. See [the tag description](/tags/hard-science/info) for more information. Sett...
[Question] [ During the Permian and Triassic periods, all the continents had joined together to become the supercontinent Pangaea. Its size means that the majority of terrestrial life might have been confined to the coasts, away from the large, unforgiving desert, and its pole-to-pole position means that with no exch...
[Question] [ I imagine that if we could transform [the Moon](http://en.wikipedia.org/wiki/Moon) into a beautiful [planetary ring](http://en.wikipedia.org/wiki/Ring_system_%28astronomy%29) around [Earth](http://en.wikipedia.org/wiki/Earth), wouldn't it be spectacular! Problem is the feasibility. Are there any practica...
[Question] [ I am working on a survival suspense story, where a sizeable group of surivors is trapped in a tropical island (somewhere in the [Ring of Fire](http://en.wikipedia.org/wiki/Ring_of_Fire)) by a volcanic eruption. They find shelter from the erpution in an old mansion built in a high-rise cliff on the edge o...