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13.1k posts
 
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Q&A The Giant Roc and Pulse Jet propulsion

I am currently in the process of making a world, and am trying to ground it in scientific fact as much as possible. The world is a hard magic setting, and while fantastical creatures exist, they ar...

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

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Q&A Bronze Age Underwater Civilization

I was thinking of an alternate history, in a part of a civilization, living along the Eastern Mediterranean, during the Bronze Age moves to the sea floor to found an underwater civilization. They ...

3 answers  ·  posted 5y ago by Anders Gustafson‭  ·  last activity 5y ago by Anders Gustafson‭

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Q&A How does targeting teleportation work without a pad or something?

So, I've got an idea for galactic travel involving some fancy particle physics and the Higgs-field, but I've just discovered I don't know how teleporting really works. Or any of that kind of stuff,...

5 answers  ·  posted 5y ago by Janie Cox‭  ·  last activity 5y ago by Janie Cox‭

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Q&A Can liquid Carbon Dioxide be used as a solvent for lifeforms?

So, i'm just searching around in spaceengine and got the idea of worldbuilding based on one of the planets that exists in the simulation (not quite worldbuilding in a complete sense, but speculatin...

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

Question biology xenobiology
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Q&A How dangerous are sodium salts?

I am in the early stages of planning a story called The Four Flamingos of the Apocalypse. The premise is that the Four Horsemen have manifested on the surface of the earth and are tasked with bring...

4 answers  ·  posted 5y ago by The Character Consultancy‭  ·  last activity 5y ago by The Character Consultancy‭

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Q&A Could you fall off a planet if it was being accelerated by engines?

Some background In the movie The Wandering Earth, the rotation of Earth is slowed to a stop, and then 10000 engines are strapped to one side of the planet and used to accelerate it out of the sola...

5 answers  ·  posted 5y ago by Steven Mills‭  ·  last activity 5y ago by Steven Mills‭

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Q&A Wings for orbital transfer bioships? - The ascent

I've been looking at the altitude boosted SSTO designs from the 90s that were designed to be lifted to launch altitude by modified jetliners and thinking about bumblebees and wondering if bioships ...

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

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Q&A How might dragon remains be turned into a jewel?

Background: I have typical dragons: Huge, scaly, winged, and fire-breathing. I also have dragon magic, but I'd prefer answers not to draw on this too much. In my world, a planet similar to earth, ...

7 answers  ·  posted 5y ago by NadiraSpzirglas‭  ·  last activity 5y ago by NadiraSpzirglas‭

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Q&A Does a character being allergic to water (specifically the $H_2O$ molecule) make rational sense?

I'm writing a drama book and it's meant to be taken 100% seriously, and the main character was born with an allergy to $H_2O$. She does not have Aquagenic Urticaria, as that only affects the skin. ...

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

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Q&A What's the overlapping calendar of two different lunar cycles

In My world of PD there are two distinct moons, Aurie is a big cream colored moon on a 32 day cycle and Chi is a smaller rust- colored moon on a 20 day cycle. Can somebody help me figure out how of...

3 answers  ·  posted 5y ago by Bett Struble‭  ·  last activity 5y ago by Bett Struble‭

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Q&A How would a supernaturally heated caldera bay affect the local climate?

A supernatural geological event occurred and created a huge caldera-like formation on the coast of a region similar to Scotland. Over time the caldera filled with water and became a bay surrounded ...

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

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Q&A Ice Dome Greenhouse

I have an icy planet with temperatures that average about -100 degrees Fahrenheit (-73,3 °C). The planet also has thousands if not millions of domes scattered across its completely icy surface hea...

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

Question flora temperature ice
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Q&A How much surface water do I need for plate-tectonics on a planet?

I want to build a habitable desert gas-giant moon and I´m not sure how little water I can give it and still get plate-tectonics instead of an Io-like lid-tectonic setup. I want plate tectonics bec...

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

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Q&A Equatorial oceanic river caused by tides

The setting: A planet with two main landmasses, each one's center located more or less at each pole of the planet. Liquid water ocean in between them, wrapping fully, if not directly (due to the ...

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

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Q&A Super earth habitability

I'm trying to build a super Earth that's capable of sustaining human life for space exploration in a way that's close to reality. So far I'm lacking some understanding of planetary science and huma...

3 answers  ·  posted 5y ago by Sheilymar Torres‭  ·  last activity 5y ago by Sheilymar Torres‭

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Q&A Would skyscrapers tip over if people fell sideways?

Suppose that for some reason gravity magically changes, but only for people. While this goes on, instead of gravity pulling people down, it pushes them East. To be clear, it's just people. Not anim...

3 answers  ·  posted 5y ago by Jason Clyde‭  ·  last activity 5y ago by Jason Clyde‭

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Q&A Why will we fail creating a self sustaining off world colony?

There have been many (many) questions around here about the how, why & even when will man kind become a multi planet society... this is not one of them. This question in fact goes the other wa...

15 answers  ·  posted 5y ago by cypher‭  ·  last activity 5y ago by cypher‭

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Q&A Odd-Toed Ungulates

I'm creating a large 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 cre...

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

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Q&A What type of chemical catastrophic event might reduce the bioavailability of iron?

I am imagining a world where an astronomical event occurs, like Earth collides with a comet, and humanity is all but wiped out. In their desperate attempt to recover, humans enter a form of stone a...

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

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Q&A Closest Proximity of Oceans to Freshwater Springs

I am trying to wrap my head around the geography of a settlement in my world. The settlement is situated along the coast, along a river roughly 500m wide with temperate mixed forests surrounding i...

3 answers  ·  posted 5y ago by A Lambent Eye‭  ·  last activity 5y ago by A Lambent Eye‭

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Q&A How high can a Victorian-era kite sail be flown?

A big problem with Steampunk airships is how to propel them. Steam engines tend to be too heavy to be useful. And sails cannot be used, because unlike sea-going ships, airships are in contact with ...

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

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Q&A How quiet can a static, non-propulsive pulsejet be?

The wizards of Magitechia have discovered that the deflagration or detonation of certain chemical compounds have beneficial supernatural effects, that are useful for powering magical apparatuses. A...

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

Question audio engineering
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Q&A How large would a circular wall need to be to appear straight?

How large (in terms of height and radius) would an outdoor circular wall (like a city wall on a colossal scale) need to be before a casual observer would perceive the wall as "straight"? I found "...

3 answers  ·  posted 5y ago by Caleb Brinkman‭  ·  last activity 5y ago by Caleb Brinkman‭

Question architecture vision
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Q&A Power of flight vs weight of object in free fall

In my story there are people with super powers, but they only get to have one. So, if someone's power is to start a fire, then they can't also control it once it starts. My problem currently is wi...

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

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Q&A Can immunity be reverse-engineered simply by using a blood or tissue sample?

I'm working on a novel, in which a character was given a cutting edge vaccination to a deadly disease. She is now valuable because she was the only one given the vaccine and the research to make mo...

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