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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.

4
votes
1answer
107 views

How quickly would an ecocircle propogate over an unlimited flat world?

Suppose a universe with similar physical laws to ours, with the major exception of gravity not existing as we know it, with an analogous force (hereafter called gravity for simplicity) acting as a ...
1
vote
3answers
169 views

Suspicious helicopter-borne relief packages

Jormungandr, the Snakebot of Doom, is sitting in the ruins of New York City, busily extracting iron and steel from the rubble in order to turn it into railgun slugs - and also extracting any survivors ...
2
votes
1answer
96 views

Earth tilt changes due to space launches

How many rocket launches are needed to change the axial tilt of the Earth so much that it is noticeable with instruments available today? We can assume that we are talking about the heaviest rocket ...
6
votes
3answers
1k views

Is the Avian species from the game Starbound plausible?

I apologize if this question is not written up to standards, I am rather new to this site. I have been an avid fan of chucklefish's acclaimed sandbox title, Starbound, for a number of years now and ...
7
votes
4answers
207 views

Is it possible to hide a base in the Kuiper Belt?

With the Kuiper Belt being composed of well over 100 million objects - some grand, some insignificant - is it possible to hide an asteroid base from enemy sensors within its confines, combined with ...
16
votes
5answers
2k views

Would carbon-based lifeforms be able to eat silicon-based lifeforms?

In the South Galaxy, the overwhelming majority of life lives on planets, breathes air, and is carbon-based. All sentient life is carbon-based. However, in the vast reaches of space, there are some ...
27
votes
14answers
5k views

How to fool a DNA test (for dummies)

It is the year 2000 and Joe has committed a crime in a small town in central Europe. When the police calls all adults living in the area to voluntarily provide a DNA sample, Joe knows he's in trouble. ...
6
votes
3answers
108 views

Technology to produce food without land, what will happen with the land next?

Let's say we have the technology to produce all of the human food in factories without the need for land (i.e. Solarfood, Memphis Meats). Right now, there is about 50% of all habitable land use for ...
4
votes
7answers
197 views

Is broadcast power suitable for recharging robots?

The last time I checked ASIMO's battery pack only had enough juice for something like 30 minutes of continuous operation & then it has to plug in & recharge which isn't really that useful. I'...
12
votes
4answers
2k views

How close could another solar system be without adversely affecting our own?

I would like to know how close two planetary systems could be without having an adverse effect on each other. My goal is to drastically improve the chances of having habitable planets near enough that ...
11
votes
7answers
2k views

Sentient Cephalopods in Exoskeletons

On a distant planet covered mostly by water a species of highly intelligence cephalopods have evolved and even developed space travel. The problem? Most other species are land dwellers and the ...
7
votes
3answers
796 views

Can cellular replacement based on embryonic copies explain the longevity of elves?

In my research on how I could get elves to live the time spans I wanted them to live, I came up with this solution: Every elf generates while still developing inside the womb of the mother copies of ...
8
votes
4answers
292 views

I'm going to have to redraw most of my rivers - what do I need to know to make them true to life?

I'm new here but I've been a worldbuilder for the last decade or so. I'm pretty late to the 'mapping out your country' party and I've only been at it for about 8 months, but I'm starting to see some ...
3
votes
3answers
118 views

What are the different areas or compartment would a colony-ship have? [closed]

So I'm trying to create a sci-fi colony ship for a science discussion that we have in class. So as a sci-fi fan (Hard sci-fi to be exact), I want to portray a realistic ship and not those cliche ...
5
votes
1answer
79 views

Could natural nuclear fission reactors be used to energetically sustain and catalyze the progress of an alien civilization?

According to Natural nuclear explosions natural nuclear fission reactors could occur. Could it happen that a primitive alien civilization has its social, economical and technology evolution ...
6
votes
1answer
184 views

What would be the atmospheric pressure gradient in an open pit reaching to the centre of the moon?

Inspired by this question, what would the pressure stabilize at over tens of thousands of years (at the moon's centre, surface, and any other interesting points) if you created a structurally stable ...
4
votes
2answers
117 views

Vibrations weakening spaceship

I have a scenario where a spaceship has been badly damaged and now the normal vibrations of the power supply are becoming amplified through the damaged hull, and threatening to tear the ship apart. ...
29
votes
5answers
5k views

How deep must be a pit on the moon to hold atmosphere at 1ATM on the bottom

In my world I would like to create a pit on the Moon filled with air. How deep would the pit need to be to get 1 ATM of pressure Could the pit maintain the air or would it be lost to space? If it ...
7
votes
4answers
555 views

Putting oxygen on the Moon - the easy way

It would be nice if there were an atmosphere on the Moon with oxygen; in fact it could be just oxygen at 1/5 the Earth's pressure. People could live there. Now of course given the Moon's lower gravity ...
8
votes
2answers
238 views

What would humans need to sacrifice for a better sense of smell?

Humans have some genes that allow for a precise sense of smell, but they were turned off millions of years back, just like in many other primates. To name an exeption, lemurs are primates with a ...
6
votes
3answers
243 views

Effects and feasability of a modern-day Olympus and Hephestus

The time... a few years from now. On the laser-launch pad of one of the spacefaring nations of Earth, a spacecraft stands, the time until its launch counting down steadily. The launch vehicle weighs ...
10
votes
3answers
106 views

Chemical process for a radiosynthetic Ganymedian organism?

I'm trying to build an underwater ecosystem under the ice crust of Ganymede. I know Jupiter emits a large amount of ionizing radiation and synchotrons and thought that would maybe be able to replace ...
0
votes
1answer
99 views

What could prevent a planet from possessing magnets/electricity?

Without changing a planet from being habitable for humans and keeping a similar ecosystem why could intelligent races never access electricity? What systems need to be erased from the planet to not ...
1
vote
2answers
245 views

How to keep intelligent races from discovering electricity?

Without changing a planet from being habitable for humans and keeping a similar ecosystem why could intelligent races never access electricity? ...
5
votes
2answers
300 views

Which unique features should have a habitable planet originating from atmosphere stripped waterworld?

Premises: red dwarfs tend to have violent sun storms in their early years, thus are expected to strip atmosphere of planets that may be in their habitable zones; water worlds (including planets with ...
3
votes
1answer
94 views

How would a 384 hour day/night cycle on a desert planet affect the weather?

The planet has a slow rotation around its axis, taking 384 hours for a full day and night cycle at the equator. There is one large continent which takes up around one third of the planets surface. The ...
10
votes
2answers
217 views

How can a bird survive self ignition?

This may seem similar to this question but my goal is for one: The bird does not die and secondly to get more exact solutions. The ultimate goal would be to create a bird which can ignite itself at ...
0
votes
0answers
34 views

Nuclear opinion. After a “plague” reactors would meltdown causing [duplicate]

After a large scale depopulation type event occurred wouldn't it be a matter or days or sooner before the nuclear power plants experience catastrophic melt downs caused by neglect of operation? I mean ...
0
votes
3answers
102 views

Whats the difference between the plane, dimensions, realm and realities [closed]

I'm trying to trying to world build a high fantasy and sci-fi. But I can't differentiate the difference between the plane, dimensions, realms and realities. So, I want to know what the difference ...
6
votes
2answers
141 views

I cast my stop-time spell and really, really, really want to punch my sworn enemy - which of these two scenarios is more believable?

I spent my life, my fortune, my family connections... I sold my children into slavery and my soul to Ilnarren... Wanted posters hang from from the Abyss of Shrondir to the expanse of d'o (most ...
6
votes
1answer
91 views

What are materials that could give an atmosphere a deep blue color?

Here's some rough WIP pixel art of the planet I'm trying to create just to give you an idea of what I'm talking about color wise. I'm referencing the dark blue that you see at the poles of the planet. ...
0
votes
2answers
128 views

Can E=MC2 be used when thinking about human strength

As we know just because a person has more mass that doesn't mean they can lift more weight or punch harder as those actions are more about training your technique. My story is a martial arts / ...
1
vote
1answer
140 views

Are there chemical elements deadly to mushrooms but not to humans?

Are there any chemical elements dangerous to fungus/mushrooms that wouldn't threaten the human species. The chemical elements I'm looking for would be in the periodic table of elements. It doesn't ...
5
votes
3answers
792 views

Can argon be dangerous for a living species?

First, the argon is a chemical element and the third-most abundant gas in the Earth's atmosphere (approximatively 1%). And I know that when someone inhales a large amount of argon, there is a risk of ...
5
votes
3answers
445 views

The Colonist - Part I: Construction

This is the first part of a series of questions I'll ask about a self-sustaining colonization ship. I'll keep editing this post as things unfold. Part II - Landing Edit 1: Added two movie references ...
1
vote
5answers
112 views

What Plants To Grow In Space? [duplicate]

Plants are quite useful to the intrepid space colonist, in addition to providing food, plants also help reduce life support burden and psychological stress by adding a splash of green to all those ...
8
votes
4answers
528 views

Feasibility of deceleration by collision

There are many hypothetical systems for bringing spacecraft of the near-future up to speed, some of which may attain some relativity-bending velocities. However, these systems, to achieve such high ...
-1
votes
3answers
131 views

Storing people in space

In the future, personal Cryonics (in the hope of cure or immortality on re-awakening)) have become enormously popular. However there is a storage problem. There just isn't enough space for all the ...
5
votes
1answer
108 views

Is a planetary 'temperature inversion' plausible?

It was disputed in the 1940s-50s whether Venus had a hot surface and cool cloud layer or a cool surface and hot cloud layer. As I recall, both were considered at the limits of plausibility at the ...
4
votes
4answers
265 views

What is the biggest cartridge caliber that can be fired while standing?

I'm designing three guns here: a two-handed rifle, a two-handed shotgun, and a one-handed handgun. All of them are breechloader guns, so they can only shoot once before reloading. The goals I want to ...
0
votes
7answers
251 views

How deep can an ordinary human completely bury themselves armed only with a shovel?

In my society, honour is all important. A condemned criminal can recover his or her family's honour by burying themselves alive as a form of suicide. My question is: How deep can an ordinary human be ...
-1
votes
0answers
55 views

Minimal changes necessary for a person who was born human to be able to fly like a bird? [duplicate]

My New Planet is sentient and affects Arkship arrivals by helping them to become whatever they are interested in, eg: birds, fish, animals, etc, while still retaining their Human mind. How would the ...
9
votes
3answers
210 views

Could humanoids without a skeleton be viable?

It's tempting to think that anything with the outer shape of a human would simply collapse in a heap if its skeleton were not there. That is surely true if the internal structure was the same as ours ...
7
votes
6answers
222 views

What would hunting with wolves look like?

NB: for more background, the humans of this question are the direct ancestors of the druids from that question. I am building the timeline of a druidic society which rose to dominate the forest they ...
2
votes
0answers
78 views

Catastophe inhibitor against WMD's [closed]

I want to have a catastrophe inhibitor (CatIn from now on) that reduces the effects of WMDs like nukes and kinetic impactors, but I do not want it to mess up other physics. It would be annoying if you ...
22
votes
6answers
2k views

Scientific explanation for a exceptionally bright night sky

On an alternative Earth live the people of Tcelonia. One of their founding myths goes that, in the dawn of times, when they were under the menace of being attacked by an enemy population, for an ...
16
votes
4answers
2k views

Lifespan of abandoned buildings

I'm exploring a post-apocalyptic world and want to build a realistic scenario for the condition of abandoned ruins. What would you estimate to be the lifespan of the following building types? And by ...
0
votes
3answers
243 views

Would an aristocratic government be feasible in a sci-fi story?

So I am interested in doing a kingdom building novel in a sci-fi universe. I was thinking of having a English aristocratic government. With the king at the top and various nobles ( Dukes, Earls, ...
11
votes
9answers
3k views

Feasibility of an endothermic gun

I had the idea of a "void weapon", which would "generate cold" rather than heat on triggering. All the air from the chamber would be sucked out (thus "creating cold") and on firing, it would open the ...
10
votes
8answers
3k views

So much smoke that the suns rays never get through?

In my book I have a city which is constantly dark. The sun doesn't reach it. This is because it's a city of waste, so all the waste gets thrown into this city and lit on fire every single day, which ...