38 questions with no upvoted or accepted answers
3k views

### How soon can the first stars form?

Introduction In our universe, the cosmic microwave background was formed approximately 400,000 years after the Big Bang. It was hot, but within a few million years after the Big Bang, it would no ...
99 views

### Limbs where muscle composition is 90% fast-glycolytic and 10% slow-oxidative. Would it be too specialized to be practical?

So, many predators, but especially felines, have more "strength" per kilogram than humans. Why? Well, it's in the type of muscle fiber they use. These types are: Slow-oxidative: Small force ...
145 views

### Weather with extreme seasons

Assuming the axial tilt of the Earth was increased to roughly 30°, and the orbital eccentricity roughly doubled(0.03 as opposed to 0.016) so that the average temperature stayed the same, but the ...
130 views

### What brain parts and processes are most plausibly able to a second incorporeal brain-like organ?

One of the conceits of my world is that the brain takes advantage of some physical processes we don't fully understand resulting in an incorporeal brain-like organ called the Yau-body. Fairly early ...
208 views

### How to calculate a village's population size

I have the two largest towns of this smallish Kingdom's populations, but the first place the protags of my story are going to encounter is going to be village or hamlet sized. Most of the resources I ...
238 views

### How do I determine the physical size of a quartz crystal of a given shape and vibrational mode needed to approximate a specific resonant frequency?

So, one of my D&D characters has a cut/relief-carved quartz crystal amulet (medallion shaped) that's both an arcane focus (crystal) and a holy symbol (amulet), and I thought it would be a good ...
51 views

### Engineering a microorganism capable of functioning under cryogenic temperatures

I'm trying to design an artificial microbe that could survive in the crust of icy moons and dwarf planets in the outer solar system, such as Pluto and Triton. I'm thinking of making them hydrogen-...
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### Maximum Feasible Size For Tidal Mudflats

Assuming real world physics and an earth-like world, how big of an area could a/some tidal mudflats cover? Criteria- More or less consistently mudflats that are partially submerged at high tides Rock ...
163 views

### Binary Star System Build - Alpha Centauri

I'm not sure if this site or Astronomy would be better, but I figured I would try here instead. I am attempting to create a [semi]plausible star system in Alpha Centauri for a series. The system was ...
123 views

### A stronger replacement for calcium carbonate in super-strong scales?

So, the microstructure of abalone shells is 95% calcium carbonate, such as aragonite, tiles and 5% organic polymer that binds them together. This binding fails in a graceful manner, allowing the shell ...
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### In the orthogonal series, when finding the 4-force between two charges would the entire world line of each need to be taken into account?

Four-Velocity is the derivative of four-position with respect to proper time, four-acceleration is the derivative of four-velocity with respect to proper time, and four-force is equal to rest mass ...
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### Could a universe with 3 or more $U(1)$ charges that are all equivalent to each other be self consistent?

In alternate universe there are at least 3 $U(1)$ charges. An elementary fermion can have a value of $±1$, or $0$ for any of these types of charge. The value an elementary fermion has for one of ...
179 views

### Dinitrogen monoxide as a gaseous oxidizer for life

Could alien life use nitrous oxide, N2O, as its oxidizing gas, like oxygen on earth? What biochemical reactions would be needed to produce and utilise this gas? I've also heard conflicting messages, ...