Questions tagged [science-based]

For questions that require answers based on hard science, not magic or pseudo-science, but do not require scientific citations. Contrast with the hard-science and reality-check tags. Do not use this tag as the only tag on a question because it describes how the question should be answered, not the topic.

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13
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6answers
3k views

Warming a world by nuking the oceans

Wrathful aliens are teaching the humans a lesson by relocating their world from a cosy 1 AU to around 4 AU away from the central Sun-like star. The planet is Mars-sized and covered in a salt-water ...
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3answers
3k views

Can humans learn unique robotic hand-eye coordination?

Can people learn precise hand-eye coordination for prosthetic or external mechanical limbs that don't have normal proportions? For example, someone is controlling a small mech via a suit or ...
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0answers
65 views

What are the technologies which has a prerequest of quantum mechanics [closed]

I'm thinking about a world where the planet was wrapped by a force field that experiments which lead to quantum mechanics and special relativity gives the false result. I'm wondering what technology ...
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3answers
3k views

I come out of hyperdrive as far as possible from any galaxy. How isolated am I and what do I see?

I come out of hyperdrive as far as possible from any galaxy. How isolated am I and what do I see? My purpose is to carry out a top-secret experiment where space is as flat as possible. For this ...
6
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4answers
377 views

Converting deserts into more hospitable places by inducing rain through the ocean?

I want to know if this is scientifically possible in the real world. When you take vast expanses of deserts (the sandy hot ones, not the icy ones) like the Sahara, life in general is restricted to ...
18
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8answers
2k views

Wattage of Laser Rifle

Looking for a ballpark estimate of the wattage of a pulse laser that would do a similar amount of damage as a .22 LR round. Something farmers would use for pest control. This is for flavor in a far-...
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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11answers
2k views

Orientation of a cylindrical habitat/ship in transit

Assume you have an inhabited O'Neill or McKendree-style cylindrical habitat or ship designed to move between star systems—not unlike Rama. What are the major advantages and disadvantages of ...
5
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3answers
136 views

What would be the best possible biogenic electric insulator?

Large, intelligent fliers would spell the end of HALO (high altitude – low opening for parachute jumps, often called HALO), jumps and the beginning of dragon-riding Navy SEALs. Obviously, only a klutz ...
5
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3answers
504 views

A perpetual storm

If there were a perpetual storm, like a hurricane, but in the middle of a continent, what would be the ecological effects? The storm is big enough that it would take 20 days for someone to walk from ...
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4answers
1k views

Setting up a bonfire in a methane rich atmosphere: is it possible?

I am trying to describe the exploration of an hypothetical planet with a hydrocarbon rich atmosphere. Atmospheric pressure is around 1 bar, temperature around 10-20 Celsius, the main component of the ...
4
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2answers
353 views

Venting Fusion reactor plasma to create a plasma shield?

Assuming that humanity can build as large as a fusion reactor needed to sustain fusion for as long as needed, would it even be half feasible to vent out the spare plasma (kind of like how a feasible ...
4
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4answers
248 views

Can a super-Earth of Approximately 1.5 Earth-Radius and 3.0 Earth-Mass Be Habitable?

Can a super-Earth of approximately 1.5 Earth-radius and 3.0 Earth-mass be habitable? By habitable, I mean terrestrial with liquid water on its surface, a rocky ocean floor, and no thick hydrogen/...
4
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3answers
205 views

What are reasonable densities for terrestrial planets?

Earth's density is about 5.51 g/cm^3 and it's the highest density in the Solar System of a terrestrial planet. I understand that planet density is partially determined by various factors, including ...
5
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2answers
214 views

Is my planet possible?

I imagined a hypothetical planet named after Bacchus (the Roman god of wine, ecstasy, parties, theatre, drama, comedy, tragedy, and spiritual madness). Its main characteristic is an ocean composed of ...
14
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7answers
2k views

Dramatic orbital spotlight feasibility and price

Background: It is the year 2021 and I am a reclusive and enigmatic billionaire with a flair for the dramatic. I would like a dramatic spotlight to shine down on me on command (at night), so that I can ...
6
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5answers
1k views

How could androids power themselves?

I'm experimenting with a sci-fi setting where human-like mechanical androids are the dominant "lifeform." Though the setting is based on science, androids live in tribal societies. For the ...
0
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2answers
497 views

Total Disintegration: Aftermath

Suppose some sci-fi doomsday device was able to generate a chain reaction that interrupts gluon interactions in matter. Once triggered, it expands through all matter in range, disintegrating atoms ...
0
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2answers
173 views

Pragmatic Plague Doctors Mask

Plague doctors are cool. There is no denying that fact. Their long robes hide their bodies from sight, flat hats which give them a professional look while the canes they carry to probe their patients ...
8
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5answers
968 views

How would a civilization of marine life avoid human detection?

In the story I'm writing, there is a global civilization of marine life that's parallel to human civilization on land, however in its world, humans have little-to-no knowledge of the underwater ...
14
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5answers
1k views

What factors influence what kind of shoreline you get?

I'm writing about a group of colonists on an Earthlike world, where I want to get the geography realistically correct, and it occurs to me that one thing I have not really seen discussed is the nature ...
0
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2answers
195 views

What would a laser gun realistically look like? [closed]

I'm writing a science fiction book where laser gun are a common weapon. The idea being that the combatative capabilities come more from the laser ionizing the air and reacting with whatever it 'hits' (...
10
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1answer
202 views

If I enter a large island into the North Sea, how would that impact local climate, weather & tides?

For the purpose of a story, I'm having an additional island in the North Sea. The island is where the Doggerbank used to be, but a bit larger. The highest "mountaintops" are around 1000m, ...
4
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4answers
211 views

Making T-rex More Dangerous Part 2: Defenses and Durability

Alright, this is a follow-up to Making T-rex More Dangerous Part 1: Proportionate Arms and concerns one of the most important factors in making a creature dangerous to humans: durability. Sure, humans ...
6
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2answers
371 views

what is the most devastating location for an asteroid to hit?

I've been wondering for a while and have seen conflicting results, so I'm asking. "if an asteroid were to hit an extremely earth-like planet, would it cause the most damage when hitting the water,...
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4answers
2k views

Making T-rex More Dangerous Part 1: Proportionate Arms

I'm sure you have questions, so here's the idea: I want to include T.rex in my world as a "boss" monster, but due to research on Quora on T.rex's ability to survive against modern weaponry (...
4
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2answers
125 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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2answers
107 views

Humans in 83% earth gravity? [closed]

A planet I’m working on has 83% earth gravity. What would this be like for a human visiting the planet?
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2answers
374 views

How fast should one be running to start a tornado?

Running so fast that it creates a tornado is used in some fighting stories, and I want to recreate that feat. The on running can have ridiculous speed, and we can have multiple people running at once ...
9
votes
3answers
874 views

Mars sized planet with 83% Earth gravity?

For one of my stories I’ve developed a planet with approximately the same total surface area as Mars. This planet has high quantities of heavier metals/elements (especially silver) and it has roughly ...
5
votes
3answers
142 views

How to Cause a Hydrosphere Apocalypse Part I The Great Drought

This is part one of a two part question. Part two can be found her (How to Cause a Hydrosphere Apocalypse Part II The Great Flood) Desert planets are a staple of science fiction. And while we have ...
28
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7answers
4k views

Keeping an environment warm without fire: fermenting grass

I am trying to develop a nomad population of human beings, living in a steppe like environment without modern technology, which for plot reasons don't use fire for keeping their refuges warm. I was ...
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2answers
229 views

How Bright Would a “Summer” Night Be on This Extreme Alternate Earth?

Here is the oversimplified map of the solar system of an alternate Earth: It is actually two separate binaries--one consisting of a red giant 100 times as wide, one-third as massive and 1,000 times ...
13
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5answers
2k views

Why would mushroom-like flora prefer to use a calcium carbonate skeleton instead of a chitin one?

I want to create a world for my colonists that's bleak and unwelcoming as well as alien and strange. So to that end I wanted to make mushroom-like fungi the major flora on the planet. I've read Where ...
0
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3answers
73 views

What physical conditions should be present on a planet for humanoid bird-creatures to exist? [closed]

I'm writing a fantasy novel with a sentient human-bird species. These creatures magically transform, growing feathers etc. becoming essentially giant birds. What would the general conditions on this ...
7
votes
1answer
201 views

When is the earliest that the Universe could support planets with long-lasting biospheres?

It took Earth ~ four billion years to go from molten rock to multicellular life. Let's take that as an absolute minimum requirement of time for organic life to evolve and produce sapient species (I ...
5
votes
1answer
90 views

Iron meteors coming directly from a core collapse supernova explosion

I want my world to be bombarded, at a certain point of its history, by a meteor shower of iron meteors. While analyzing the recovered samples of the meteor showers, the local scientists find proof ...
6
votes
3answers
257 views

Non-falling world

My goal is make a world where you cannot fall. So in my world (or at least city) you slow down as you fall so you wouldn’t be going fast enough to get hurt when you land. Im thinking the air is like ...
2
votes
3answers
113 views

Damage estimate for a large acetylene explosion

In a laboratory in a university building, a gas tap is accidentally opened at the end of the working day. The gas tap is connected to a bank of large acetylene cylinders. The gas tap is ejecting 0....
3
votes
2answers
153 views

Laser cooling a person

So in my story, I'm trying to develop a plausible freeze ray. Now many people suggest liquid helium, but it seems to have a number of practical setbacks, such as being hard to obtain, needing vast ...
1
vote
0answers
87 views

Why does an Insectoid species that reproduce via deuterotoky still have males [closed]

Say you have a (sentient Hive-minded) bee-like alien, that functions pretty much like a earth bee: Builds hives, the only fertile female is the Queen, has different castes, drones are only there to be ...
5
votes
4answers
193 views

Justifying Reverse Time Dilation / Time Acceleration using White Holes

I am not sure if this should go to the Physics Stack Exchange or here, but here goes. So, I heard about the time reversed variant of black holes, known as white holes, which expel matter rather than ...
-3
votes
1answer
55 views

Could the vaporization of all the oceans push away most of the air in the atmostphere?

You may remember my question here, part of which assumed that all humans would die in one way very quickly, with minimal destruction to the planet. This question will ask about the way humans would ...
1
vote
2answers
130 views

Is an atmosphere that it's not breathable but won't damage the skin on a tidally locked Ocean planet plausible? [closed]

In my story, people are trying to colonize an Ocean planet that orbit Ultra-cool red dwarf. (Based on this Wikipedia article a planet can retain Water in this type of stars with a mass around 0.08-0....
3
votes
2answers
169 views

How long can the Air Force One be airborne [closed]

How long can the Air Force One (or VAC 25-A, since Air Force One is only a call sign) stay in the air before it has to land ? Restrictions: American airspace only Supply available for long flight air ...
3
votes
1answer
94 views

Plausibility of this Atmosphere on Ocean worlds [closed]

My planet is an Ocean world tidally locked to Ultra-cool red dwarf Star. (Based on this Wikipedia article a planet can retrain Water in this type of stars with a mass around 0.08-0.11⊙ and avoid ...
21
votes
13answers
9k views

If you lived 5,000 years, would you notice the continents moving?

I am trying to develop a story where it is based on Earth around the 42nd century and can't figure out if the continents would have made any noticeable/notable shifts. Any help is appreciated. Edit: I ...
3
votes
5answers
296 views

Throwing away muscle memory to make brain backups smaller. Would it work?

Overlord is the best 5-episode anime, as I only acknowledge the existence of episodes 14-18, the rest is gorehound edge bait I can only recommend to people who are still flaming about the titan CGI. ...
6
votes
2answers
140 views

Dodgy Radio Communications

This question relates the same world discussed in this post: Horseback Travel in an Unpopulated Pacific Northwest Two mounted patrolmen are tasked with navigating and policing a reimagined Coastal PNW,...
1
vote
1answer
89 views

energy sources for intergalactic travel in fictitious universe with similar laws of known physics but different evolution

This question differs slightly from the many excellent threads on topics similar to this one. In the fictional universe I am contemplating, the same laws of physics apply as in ours, but because of a ...

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