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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
30 views

How could a plague that killed off the dinosaurs come back?

In my story, something pretty insane happens during the 3rd season. The common conception was that an asteroid strike contributed to the extinction to dinosaurs, but unbeknownst to all it was not a ...
2
votes
9answers
620 views

Technology for a sci-fi airship

Sometimes old, discredited or impractical ideas come back to favor, because a new technology has evolved. Let us imagine a future Earth-like world (not early 20th century or steampunk) that would ...
2
votes
4answers
177 views

How could written materials be preserved after 3000 years of history? [on hold]

Premise Grandmaster Fredrietch Kalven, a researcher of lost arts, was tasked by the king to find and record all written histories of their world since the earliest writings. After many years of ...
2
votes
2answers
91 views

Floating cities with a new superconductor

Inspired by this great answer. There is a planet with: Floatium, a superconductor that behaves as such at 0 ºC and is found in nature. A stronger magnetic field than Earth's. In really cold areas I ...
64
votes
34answers
18k views

What (modern) weapons could be used to destroy skeletal enemies as completely as possible?

As per the cliché, after getting hit by a truck, our protagonist finds herself in a 'swords and sorcery' fantasy world. Also as per the cliché, she is granted an overpowered ability to make her new ...
16
votes
7answers
5k views

What can we do to Mars to give it a survivable atmosphere?

Some science-fiction books I've read (including more than a few by Ray Bradbury) have men from Earth living on Mars, walking around outside of enclosures. I know that this is currently not realistic, ...
14
votes
5answers
4k views

Using light as a barrier to block people without grilling them

We know that light exerts pressure upon matter. I'm imagining a hallway where an intense light source on one end shines towards the other end. The goal is to have the beam of light exert so much ...
1
vote
2answers
117 views

Destroying one of the Great Pyramids without killing the protagonist [on hold]

A woman finds herself inside the Great Pyramid of Kheops when a bunch of terrorists starts blowing it down from outside. The woman manages to find a way out but before being able to leave the Pyramid,...
2
votes
6answers
306 views
+100

Most effective Faraday-Cage hat design to avoid government spying

A tin foil hat is a hat made from one or more sheets of aluminium foil, or a piece of conventional headgear lined with foil, worn in the belief or hope that it shields the brain from threats such ...
-1
votes
5answers
281 views

How could a civilization end up confined within walls?

In Shingeki no Kyojin humanity is confined within walls to protect them from giants on the outside. In this case, I'd like to imagine a civilization (doesn't need to be all of humanity) within a huge ...
3
votes
1answer
128 views

Would it be possible for an animal to develop pneumatic muscles through evolution? [on hold]

I have been pondering the question of how make animals stronger in unusual ways. It was during this process that it occurred to me: "Can living things naturally develop pneumatic muscle systems?" For ...
22
votes
4answers
5k views

What happens when two flames meet from opposite sides?

What happens when two flames (whether from dragons or blowtorches) meet head on? Many films make it appears as a front where the two flames repel each other, but my intuition is that, in fact, the two ...
2
votes
2answers
116 views

Mechanism to slow down the light emitted by an object such that it will result in inaccurate position of the object to the observer?

Let's say that there are two people named S and C. They are not far apart; less than 10 meters. Let's also assume the scenario takes place in late evening or in the night, for simplicity. Normally ...
5
votes
3answers
143 views

How much equipment would be needed to set up a mining colony?

Setting: a mining colony on a distant world, exporting rare-earth minerals. As in many space opera stories, the world is a shirtsleeve environment with a reasonably pleasant biosphere. Tech level: I ...
6
votes
7answers
164 views

Napoleonic Future Warfare: Technology for Ground Combat?

In a 'verse with Conveniant Interstellar Travel (in the scale of a few weeks to a few months for neighbouring star systems), the East Orion Company controls large swathes of the sector thanks to their ...
-6
votes
3answers
247 views

Future People on Earth [closed]

I watch the TV show The Last Man on Earth and there is only a handful of women and men living. In the show the few are trying to conceive. They haven't covered how eventually they will have to inbreed ...
1
vote
0answers
46 views

Can Artificial Expansion of Space Facilitate Dark Energy [on hold]

Granted, not much is known about Dark Energy. Indeed, it may not even exist. What we know is that something is driving the expansion of space (understanding we do not live in a Hubble bubble). This ...
6
votes
1answer
72 views

How to create an artificial hurricane?

Imagine a civilization capable of interstellar travel and building Dyson structures, so technological advancement and energy acquisition are not a concern. They found a planet that is very Earth like....
28
votes
6answers
4k views

How can I make raindrops bigger?

I've got an intelligent humanoid species living on a planet very similar to Earth's. However, on this planet, rainstorms are more frequent and slightly... different. Each raindrop is at least an inch ...
18
votes
9answers
4k views

How long will it take for the amount of living to exceed the dead population?

The current world population is around 7 billion living people and 107 billion dead people. Since the population is increasing steadily and faster than ever, I was wondering if we could ever reach the ...
1
vote
1answer
81 views

I Need Help With Human Degenerative Disease (HDD) [on hold]

I am currently working on a post-apocalyptic world where roughly 90% of humanity get infected by HDD (Human Degenerative Disease). HDD causes the human brain, gland and tissues to change quite ...
3
votes
1answer
286 views

Interstellar Propulsion for Hard Sci-fi Novel

Hypothetical: Hundreds of years into the future. Humanity needs to travel to exoplanets quickly. I'm aiming for hard sci-fi. What kind of propulsion can travel people at 0.1 - 0.9 lightspeed? Is it ...
21
votes
5answers
5k views

How long would it take a body to decay and the bones to fall to the ground from a tree?

Death occurs in extremely high humidity and an average temperature of 23 C (~75 F), both of which continue for six weeks. At that time, temperature begins to fall over the course of eight weeks to an ...
4
votes
7answers
312 views

Building An Android

I'm in the midst of writing a space opera, and there are several characters that are sentient androids and I need some help with their physiology. I have them set up with small fusion cores for power, ...
3
votes
1answer
259 views

Iron based life

Lately I have been thinking about possible forms of life on planets that would have radically different experiences than here on Earth. I was wondering if life based on transition metals was possible ...
5
votes
6answers
436 views

How would gravity affect a structure that completely encircled the earth

If a circular structure could be built that would wrap around the entire earth, but was of a larger radius, would it 'float' above the earths surface or would it somehow fall onto the surface at some ...
5
votes
3answers
444 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 ...
2
votes
2answers
137 views

What are the architectural considerations when an underwater species builds a city?

I've got a species that lives in the Southern Ocean along the Antarctic coast, and they are basically a sentient crossbreed of Orca whales and elephant seals. They are omnivores, have opposeable ...
5
votes
2answers
68 views

Maximum realistic salinity level with thriving aquatic environment?

I'm trying to create a planet which environment is not immediately lethal to humans, (reasonable oxygen level) however after closer inspection turns out not to be specially Earth-like. One issues is ...
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'...
4
votes
1answer
181 views

Is sleep exercise possible? [on hold]

Is is possible to put someone to sleep and, while they are sleeping, attach muscle stimulating pads, causing the muscles to do work and causing exercise to be done without consciousness?
4
votes
3answers
125 views

Is it possible to create light emitting creatures using selective breeding?

Suppose I take a group of alligators select the ones that emit the highest frequency of radiation (since all living creatures emit thermal radiation), and I breed those, and get rid of the rest and ...
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 ...
5
votes
3answers
119 views

Could Multicellular Life Evolve Sans Cryogenian?

Prior to the Cambrian, there have been three separate ice ages--the Huronian, from 2.4 to 2.1 billion years ago; and the two Cryogenian ice ages, from 720 to 635 million years ago, split in such by a ...
-2
votes
0answers
86 views

If a powerfull corporation had the ability to change human population what would be the best value for that corporation? [on hold]

The Corporation will be Google but it doesn't have to be. (Used only as example) Google have used their data to create an algorithm which is able to predict which answers sites and videos (YouTube) ...
7
votes
2answers
331 views

Harvesting resources from a geostationary point 100km above sea level

Consider a planet which is entirely Earth-like. Same mass, same rotation, etc. But in this world, resource-rich objects are suspended by some phenomenon at varying altitudes up to 200km above sea ...
27
votes
5answers
5k views

How to detect that the universe got mirrored?

This might be more fit in physicsSE, but since I don't even know if my premise is physically sound, I'll post it here. One day, something caused the universe to get mirrored, meaning a left-right ...
-6
votes
3answers
130 views

A proposed method of flying for superheroes

I can understand Super-beings' great strength and some of their other powers, but flying is hard to justify. I want to consider only superheroes that can actually fly rather than merely jump tall ...
7
votes
1answer
73 views

Co-orbits and Tides

I've seen many questions about tides and tidal variations on a wide variety of interesting single star, multi star, single planet, binary planet, single moon, multiple moon, and even ring system ...
2
votes
3answers
247 views

Explosive joints that allow people to jump really long lengths

How does a joint need to operate and be structured in order to allow a person to do leaps of 10 meters in length with ease and without taking a long run first? Here's an example of what I'm talking ...
7
votes
5answers
258 views

Shooting down an enemy ship at FTL speeds

In the story I'm currently working on an alien race holds the monopoly on FTL travel. They're using a modified Alcubierre drive system, powered by Negative Mass. Humanity stumbles on a source of ...
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 ...
9
votes
4answers
1k views

What devices would people use to tell time on a tidally locked planet?

My question is as stated above: if a planet is tidally locked to its sun, how would the people on the surface, assuming it's habitable, be able to tell time? What devices would they be able to use? ...
116
votes
11answers
21k views

How would I know if I were a 1 mm tall robot?

In the 1955 science fiction short story, The Tunnel under the World How would I know if my consciousness had been uploaded into a miniature robot living in a replica town? What would be the most ...
8
votes
7answers
542 views

How viable would powered armor be in a realistic military setting?

I am currently writing a story, and part of it involves the invention and use of powered armor by the military. What I was curious about was how useful this armor would actually be, and what roles it ...
0
votes
3answers
240 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, ...
4
votes
2answers
652 views

What causes hot deserts (like the Sahara) under the ITCZ?

I am trying to fill my world with climates as realistically as possible. In addition to climate science stuff I read on this site, I've been using these two maps of the Earth as a comparison for where ...
35
votes
34answers
12k views

Why would a fighter have a weaker shield than a capital ship?

I enjoy designing games, and in one that I'm working on the ships have shields, similar to the shields in Star Trek. They are created via some kind of force field projection mechanism and are ...
0
votes
0answers
38 views

Creating a earth-like moon orbiting a gas giant that life can evolve naturally [duplicate]

We're trying to create a alien race physically very similiar to humans including carbon based chemistry but with completely different mindsets, culture and society because of the different ...
15
votes
4answers
3k views

How long can a preserved human body last before turning to dust?

Some Context The setting is a fantasy world with lots of magic where Liches exist. A Lich is "born" through a series of complex, dangerous and horrific rituals that a mage casts upon himself over ...