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13.1k posts
 
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Meta Merger with a Worldbuilding site?

I am positive to a merger and I think perhaps a rebrand of this site so that is sorts below a Worldbuilding one would be the best way to go. https://worldbuilding.stackexchange.com/ is already an ...

posted 2mo ago by Lundin‭  ·  edited 1mo ago by Lundin‭

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Meta Wrong category name in FAQ - "Researched Q&A" instead of "Rigorous Science"

You are quite right. This has been fixed, thank you for pointing it out.

posted 4y ago by Canina‭

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Q&A What conditions would cause an extremely dense (dark) coniferous forest to grow?

It is said that in dense rainforests, only 1% of sunlight (sometimes less) reaches the forest floor, which greatly restricts the types of plant and animal life that can survive there. My (limited) ...

1 answer  ·  posted 4y ago by xtal‭  ·  last activity 4y ago by Olin Lathrop‭

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Q&A Could grow lights on a massive scale replace 100% of sunlight for 100% of the growing season?

In a world where pollution and population have drastically reduced the effectiveness of sunlight to grow food, would light-panels be capable of completely replacing the sun? The problem I'm trying...

2 answers  ·  posted 3y ago by JBH‭  ·  last activity 3y ago by KalleMP‭

Question agriculture light
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Q&A Could there be a way for a solar system to be very precise, so that the lunar calendar and solar calendar align?

I know that this is a bit silly, but I want to make a calendar for my world and I'm really worried about having to do leap years and such to ensure continuing accuracy. Inaccuracy isn't an option;...

4 answers  ·  posted 1y ago by Bianca_Railway‭  ·  edited 1y ago by tripleee‭

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Q&A What Factors Could Cause a World to See "Northern" Lights Much Closer to the Equator?

One way to achieve this would be to simply change the structure of Earth's magnetic field. At the moment, the field is that of a large magnetic dipole, with the field produced by the motion of flui...

posted 10y ago by HDE 226868‭  ·  edited 4y ago by HDE 226868‭

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Rigorous Science Nuclear energy storage

Yes, nuclear fission is reversible. Actually, it's more like fission is the reverse of fusion. Fusion is what stars do. Mostly stars fuse hydrogen to make helium. Fusing light elements releases...

posted 2y ago by Olin Lathrop‭

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Q&A How would an interstellar spaceship's speedometer work if everything else is moving?

A speedometer is a gauge or device used for measuring instantaneous speed of moving vehicle roughly speaking, so for example the reading shown on the speedometer of a car parked at road side displa...

14 answers  ·  posted 9y ago by user6760‭  ·  last activity 2y ago by James McLellan‭

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Q&A What Factors Could Cause a World to See "Northern" Lights Much Closer to the Equator?

I'm currently designing a world where the inhabitants see the Aurora Borealis on an almost nightly basis almost all the way to the equator. The lights are so strong they rarely see the stars beyond...

4 answers  ·  posted 10y ago by Liath‭  ·  last activity 4y ago by Canina‭

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Rigorous Science Do plants need ambient oxygen?

Yes. All plants require free oxygen, and any (part of a) plant that is not actively photosynthesising has to obtain its oxygen from its environment. We owe our oxygen supply to the fact that, on a...

posted 2y ago by Pastychomper‭  ·  edited 1y ago by trichoplax‭

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Rigorous Science Create "gold" from lead (or other substances)

What I need is a substance which could have been mixed by an alchemist and is as gold-like as possible. How about gold itself? Bear with me, here: While there are a lot of things that look ki...

posted 8y ago by type_outcast‭  ·  edited 4y ago by HDE 226868‭

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Rigorous Science What constraints are there on the orbits of moons in a Laplace resonance?

I'm interested in giving a conworld moons orbiting in a Laplace resonance, like the inner Galilean moons of Jupiter. Here are the constraints I believe hold for moons in a Laplace resonance (orbit...

0 answers  ·  posted 6mo ago by mwchase‭  ·  edited 6mo ago by mwchase‭

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Meta Is Scientific Speculation the Right Place for a Discussion Series About Space Sports?

I'm speaking as a regular user here despite that "staff" label next to my name. Scope is decided by communities, not imposed from above. I think science-based questions about sports, like golf in...

posted 2y ago by Monica Cellio‭

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Meta Do we want to keep the [science-based] and [reality-check] tags?

[science-based] almost certainly should be removed - I think we can safely assume that a site called Speculative Science is going to require science-based answers across the board. If an post's not...

posted 4y ago by HDE 226868‭

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Meta A few questions as I dip my toes in the water here

That's a lot of questions all lumped together in one, and as I don't have an hour or two to write up good answers for each of them, short ones will have to do for now. There are 500+ tags, app...

posted 3y ago by Canina‭

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Q&A Black as color of magic

It's not black at all, it's not even light (or maybe even any other wavelength of photons) at all, but something about the magic interferes with the ability of our rods and cones to interact with l...

posted 4y ago by Aliza‭

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Q&A How do you establish identity when people can change their appearance at will?

Since manipulation of the brain is prohibited and illegal modifications are assumed to be reliably caught, the obvious way to check someone's identity with biometry would be by checking their brain...

posted 4y ago by celtschk‭

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Q&A Competently Mobile Photosynthetic Animal?

No matter what mechanism your animal uses for running its systems from sunlight, you still have the fundamental limitation of sunlight power per area (insolation). Solar insolation at earth's dista...

posted 4y ago by Olin Lathrop‭

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Q&A Analogue Encryption, without converting to digital

It doesn't make much sense to talk about transmitting "keys" when the encryption is analog. Since you want to stay away from digital, the encryption and decryption will need to be done in analog h...

posted 1y ago by Olin Lathrop‭

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Meta Wrong category name in FAQ - "Researched Q&A" instead of "Rigorous Science"

In the "Scientific Speculation FAQ" page, at the section "What are the different categories for?", the categories are described as: Q&A is for general questions. Researched Q&A is for que...

1 answer  ·  posted 4y ago by hkotsubo‭  ·  edited 4y ago by Monica Cellio‭

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Q&A How Would the Sport of Wrestling Change in a Microgravity Environment?

Drastically. For one thing, pinning your opponent's shoulder to the mat is no longer possible. Very different criteria would be required to determine winning. The different objectives would in t...

posted 2y ago by Olin Lathrop‭

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Q&A Was the total amount of water on earth ever significantly different?

Kind of depends on whether you mean water as in H2O molecules or water as in state of matter = liquid. The amount of liquid water will naturally vary a lot depending on seasons and warmth. We know ...

posted 3y ago by Lundin‭  ·  edited 3y ago by Lundin‭

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Q&A Where should my island mountain ranges be, based on my plate tectonics?

It looks like you will have uplift, frequent earthquakes, and volcanos in the lower part of your island where three plates are jamming together. In the northern part, the plates are spreading. Yo...

posted 10mo ago by Olin Lathrop‭

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Meta Renaming Researched Q&A

Before launching the site, we had a discussion on Codidact Meta about naming the category we currently called "Researched Q&A". Other possibilities we explored included "Hard science", our sta...

2 answers  ·  posted 4y ago by HDE 226868‭  ·  edited 4y ago by Monica Cellio‭

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Q&A Could a habitable planet lit by the cosmic microwave background plausibly exist?

A back of the envelope calculation suggests that you need a velocity relative to the CMBR of more than 0.9c. (1mm microwaves blue-shifted to 570nm light typical of yellow dwarves) This is a proble...

posted 3y ago by dsr‭

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