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Building on the universe established in this question, what happens to identity verification when someone's physical appearance and genetic code are modifiable at any time? Review of universe rule...
Imagine a spacecraft in a highly eccentric orbit. Say the craft burns at periapsis towards the planet such that its orbital eccentricity does not change and the craft's periapsis moves with the shi...
I've got this idea of a rogue planet that is moving that fast through the intergalactic void that the cosmic microwave radiation, thanks to the Doppler effect, actually provides enough heat that it...
Under normal circumstances, monolithic diamond is pretty terrible at resisting impact, due to it being weak in certain planes, also known as cleavage planes. To solve this, why don't we just make ...
Years ago I read a letter in a magazine suggesting a method for reducing the fire risk in an enclosed environment such as a space shuttle. The idea was to reduce the oxygen concentration to the po...
The shell variant of a Dyson sphere consists of an artificially-made shell of material about 1 AU in radius encircling a star. The sphere captures most of the star's energy and stores it for future...
I would suggest simply closing them as off topic. Deleting the questions seems a little heavy-handed for now, but we should indicate to visitors (and people who might want to answer them) that a p...
Someone posted a Worldbuilding proposal on the Codidact incubator. The topics allowed on such a site are very similar to the topics allowed on this site; for the most part Scientific Speculation i...
Let's look at the (rather poorly named) FAQ page in the help center which tries to specify in a bit more detail than the few words of a site name what the site's scope is: Scientific Speculation...
As I see it, the operative word in answering the question you're asking here is speculation. Now, of course, it's almost impossible to capture every nuance in a site name, which is why we have a pa...
Myself, I think that all sciences are in scope on this site. (We're already barely getting any traffic; artificially restricting scope further probably won't help much with that.) The way I see it ...
This is based on a question in Writing about revitalising the community and is pretty much a blatant copy-paste of Monica's answer there. Essentially, it's been suggested that we remove all mass-i...
Some topics may be good for a more general worldbuilding site, but are not appropriate for SpecSci. For example, How can my vampires hide in public? or How can I prevent the creation of fruit-sal...
I received a notification saying that there's a new answer to my question: But when I clicked it, I saw no answers. I can think of 2 possibilities about what happened: There wasn't an answer and ...
First, the fussiness of the people has absolutely no bearing on how their solar system ended up. It is what it is, whether they like it or not. As for the physics, you are basically asking for ro...
A now-deleted question involved archaeology, linguistics, and history. There were some downvotes and critical comments, and the author deleted the question. I don't know whether the downvotes wer...
It appears you want to go around a planet significantly faster than at the speed of a normal inertial orbit. That's gonna cost one way or another. Something has to create the downward force to ke...
Your intuition is correct. Let's suppose that at STP, a human needs to breathe 1L of O2 in 200 minutes. That's 1.43g of gaseous oxygen. If the pressure is raised to 5 bar, a human still needs 1.43g...
The first question is: What is instantaneous speed measured against (that is, what is the “ground” relative to which the speed is measured)? Remember that there is no such thing as absolute speed. ...
I speculate that because laser is heat and too much water especially with big/round laser beams can cause injected water to "boil" This argument doesn't make much sense. First, your insides are a...
Small islands have been built in inland waters since prehistoric times, but using sea floor material to build an offshore island is a much larger project. As Peter Taylor and JBH have pointed out,...
Short, easy-to-read gene tags. Since all modifications are reliably policed, you can require that every modification includes a short, non-coding DNA sequence containing the recipient's legal iden...
a type of light we could perceive as black because our eyes ... do not That's anything in the EM spectrum other than visible light. So exclude roughly 400 to 750 nm wavelengths. Infrared and ultr...
If you lower the gravity, it is possible. Otherwise the wear&tear will cause a short lifespan (ligaments, joint cartilages, heart). Aside larger height, the bipedal position comes anatomic dis...
NASA's Fundamentals of Electric Propulsion: Ion and Hall Thrusters by Goebel and Katz, JPL, March 2008 discusses the issue of current ion drive beam focus limits (along with many other matters rele...
