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Questions tagged [alien-geometry]

This tag is to be used when considering the geometry of the universe itself. It refers not to extraterrestrial species, but to geometries completely foreign to normal experience.

2
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2answers
117 views

What 4D shape could best fit a looping world?

I have an idea for a world such that the world itself is like a large loop. The best way I can think to describe it is going step by step through the "loop". Imagine a planet-like object; a sphere ...
3
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0answers
125 views

What would the periodic table look like in 2 dimensions? [closed]

I've read this question What would the periodic table of a 4-Dimensional universe look like?, and I think it answers part of my question about how atomic physics would work, but I'm not sure. Would a ...
11
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1answer
250 views

How would crystals be different in hyperbolic space?

Let's say our world is set in a hyperbolic space with a curvature K of −1 per 9 square meters. How would crystals be different than those in our world (assuming that the atoms are the same as the ...
2
votes
1answer
91 views

Given a liquid or gas environment, would radial symmetry be an advantage over bilateral?

Europa, Jupiter or small planets offer different environments and gravity for alien life to evolve. I see many advantages to life possessing radial symmetry in both lower and higher gravity ...
97
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10answers
9k views

Would planets be cubic in my “cuboverse”?

Summary The main idea behind the "cuboverse" is that spacetime distances are measured by (something close to) the sup norm or infinity norm. Under this norm, spheres (the set of points at a fixed ...
4
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2answers
244 views

Strategic Value of a 720 degree line

In this world, there is a line of 720 degrees, as opposed to Strategic Value of a line of symmetry which has a line of 180 degrees. In particular, looking at a cross section of the world, imagine ...
52
votes
37answers
11k views

Shapes for an infinite animal?

This creature exists in an infinite world, a flat landscape that extends ad infinitum, where light rains from the sky from infinity during recurrent day-night cycles, and, similarly, the ground goes ...
8
votes
2answers
169 views

How does the air remain stationary in The Big Blue?

The Parachute Cities fall endlessly, ploughing their way downwards through an infinite blue sky. The Big Blue is a universe of sorts. It certainly has no bottom, but it does have a concept of ‘down’. ...
22
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10answers
5k views

How to prevent your enemies from digging under you?

So, my world is a sphere (roughly) within hyperbolic space. Since the surface areas of spheres in hyperbolic space grows exponentially with radius, it has the same surface area of the Earth (indeed, ...
2
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2answers
262 views

Warfare on a “plane” of “islands”

In my question, a space fabric "plane" consists of many "islands" strewn about, and any point of the plane which isn't part of an island is "bottomless". The "gravity" at a point is affected by the ...
8
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5answers
634 views

How to navigate the hyperbolic world

Let's say our world is set in a hyperbolic space with a curvature $K$ of $-1$ per $9$ square meters. The surface of our world is a hyperbolic plane (approximately, there are still hills and valleys ...
8
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1answer
186 views

How to use a balloon at the Center of the Earth?

Imagine a world like Pellucidar or Skartaris. This world exists on the inside of a 'hollow Earth'. The laws of physics apply as normal, except as follows There is a gravitational force that attracts ...
5
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2answers
799 views

What if a traversable wormhole hits the earth?

So, I the question of what if a black hole hits the earth has been asked to death by various people, but what if the somewhat tamer wormhole hits the Earth? In particular, we'll say that one mouth is ...
3
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4answers
339 views

Strategic Value of a line of symmetry

So in my world, there is a line of 180 degree symmetry. What this means if that if we assign it coordinates of (0,0,z), then (x,y,z) and (-x,-y,z) will be the same point. The z=0 plane is the ground. ...
13
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6answers
496 views

How can orientation-discriminating people keep their views when it turns out they live on a non-orientable surface?

In my world, there are two types of people, lefties and righties. They have opposite orientations, which means they are mirror images of each (they are Enantiomers of each other essentially). Through ...
3
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0answers
92 views

What would a universe without relativity be like? [duplicate]

Our Intrepid Researcher has fallen down the rabbit's wormhole, and found herself in a Strange New World. While attempting to determine the local force of gravity, she notices that her gold (plated) ...
7
votes
2answers
434 views

At what scale would negative curvature be noticeable (and a nuisance to the flat space society)?

After playing some HyperRogue, I got interested in the use of hyperbolic geometry in WorldBuilding, in particular how an area grows exponentially with respect to its radius. Let's say that the ...
11
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3answers
356 views

Does gravity converge in a wrap-around universe?

This is a follow up to What would physics be like in a wrap-around universe? PyRulez commented, “Will gravity still make sense? (Namely, will it converge or not)?” This was bantered about in the ...
4
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3answers
190 views

What extradimensional topology would explain looping forces? [closed]

In my magical world there are two contrary forces, or rather essences that flow in the two opposite directions of another dimension perpendicular to our own. One is named aether and flows "up", the ...
9
votes
8answers
1k views

How can we 'fill-up' a 4D space with 3D matter?

Imagine that you need to fill-up a 4D unit hypercube with 3D unit cubes of water. At first, I thought you'd need an infinite amount, arguing that it would take an infinite number of stacked 2D ...
2
votes
2answers
219 views

Is there a plausible way to exchange matter between spatial dimensions?

Assuming humans live in dimension 3+1; 3 spatial dimensions, length width and height, and one dimension of time, Is it possible to move matter from our dimension 3+1 to another, such as 4+1 (adding a ...
4
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2answers
318 views

Machines in four spatial dimensions

Assuming that we have a universe with four spatial dimensions plus time, within which atoms exist that can form solids, liquids, gases and plasmas, the compounds that can be formed having physical ...
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3answers
503 views

What happens if Pi is changed? [closed]

A mad scientists constructs a device which changes Pi instantly from 3.1415... to something like 4.7182...; it is still an irrational number but it is different. What changes would happen? The ...
2
votes
1answer
155 views

What if the laws of mathematics were different in a parallel universe? [duplicate]

Mathematics is the base of everything. What would happen if the laws of mathematics would be differend in an universe? How would the universe work, what would be the laws of physics, etc... Examples ...
19
votes
4answers
915 views

What would physics be like in a wrap-around universe?

This question has some close votes but has been edited/clarified, and has attracted more comments and discussion over the possible answers, and the geometry has overshadowed the actual question being ...
3
votes
1answer
1k views

Geography in a universe with 4 spatial dimensions

In my answer to my own question, Physical laws for a matter-filled universe, I detail the gross physical laws that would shape my four-spatial-dimensional matter filled universe. Given a slowly ...
7
votes
7answers
2k views

Infinite tube world

I'm inspired by this question and was thinking that it is nigh impossible for sun, moon and star to exist in this world and even if they do, there is no way to sun and moon to orbit and create day-...
0
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0answers
59 views

If one of the spatial dimensions *not* perpendicular to gravity wrapped around, how would architecture be different? [duplicate]

Continuing this question, but with a slight change. In this world, if you go 7 feet east, and then 7 feet up, you would be in the same place. Note that the ground wouldn't be perpendicular to gravity. ...
6
votes
2answers
454 views

If one of the spatial dimensions wrapped around, how would architecture be different?

Following the same geometry as this question, how would architecture be different? To review, when go east or west 5 feet, you end up back where you started. Is there a way to make structures feel ...
8
votes
3answers
409 views

Chemistry in two spatial dimensions?

I know that someone has asked how chemistry would be in four dimensions but I was wondering what would chemistry be like in two dimensions? From what I understand, in two dimensions, particles, ...
16
votes
2answers
2k views

What would organisms be like in four physical dimensions?

In this question, I asked about a matter-filled 4-spatial-dimensional universe, with a gross structure defined by my own answer to that question. Then, in this question, I asked about what the ...
4
votes
3answers
770 views

Consequences of a two-dimensional universe on cells and life

Suppose you have a 2+1 dimensional universe where the physics of that universe (we'll assume that the physics causes something similar to chemistry and that there is no gravity, but there is special ...
10
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3answers
624 views

If one of the spatial directions wrapped around, how would combat be different?

This is a test drive of the alien-geometry. I hope it will be a fun tag. Okay, for the purposes of this question, the world is flat (like, you still have plants and hills and stuff, just no long term ...
11
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3answers
353 views

Living in the surface-volume of a hypersphere

Context: I'm designing a "demi-universe," accessible from Earth (via appropriately supernatural means), that has the following internal topological property: given any point in 3D space, and any 3D ...
2
votes
5answers
687 views

Where is the inside of the Tardis? Is it a world in itself? Is it part of a different world?

The Doctor's TARDIS is larger on the inside than on the outside. How can this be achieved? The conventional answer is that The TARDIS is dimensionally transcendental ... the interior exists in a ...
36
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2answers
4k views

What would the periodic table of a 4-Dimensional universe look like?

In this question, I asked about a universe with (amongst other things) 4 large spatial dimensions. In 3 dimensions, we have the familiar periodic table with its familiar arrangement of atoms in the S,...
49
votes
11answers
6k views

Infinite flat world

Instead of discovering that earth was round, we find that we live on a infinite, flat "earth". What are some cultural implications if we were to live in a world like that (disregarding any physical ...
4
votes
3answers
2k views

Interactions with higher dimensions

I was reading Flatland, and the thought occurred to me that interaction between an n-dimensional being and a n+1+-dimensional being may not only be difficult but dangerous, that Flatland contains ...
12
votes
7answers
2k views

Expanding your empire's space from the inside — can it be useful?

Imagine your scientists have found a way to increase the space of your empire, literally: They are able to create an artificial inflaton field which locally creates a "space bubble" connected with ...