Questions tagged [alternate-worlds]

For questions about worlds other than Earth that are significantly different. This could be a water, ice, barren or other planet. For questions about planets similar to Earth with specific differences use the *earth-like* tag.

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8
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3answers
1k views

Climate on an Island World

I'm currently creating a world with a population of about 4.5 billion people and 21st century technology. In fact, the world is strikingly similar to ours. Oh, except the islands that is. The ...
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2answers
521 views

What would we buy for our new planet? [closed]

I recently read that the combined wealth on earth is £146 trillion. If we divide that by the worlds population of 7 billion we get approximately £21k. My question is If the human race was transported ...
6
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2answers
271 views

Personal Plant Survival

We are in an alternate universe where everything is almost exactly the same. The difference is that each person is born with a single plant. Plants cannot be grown or recreated in any way. The only ...
13
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4answers
1k views

P = NP goes public today. How will the world look like in a week?

Some autistic genius mathematician just published a solution to the long-standing problem of P-hard problems being equivalent to NP-hard. The solution just hit Reddit, Slashdot, math.stackexchange.com ...
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5answers
2k views

Development of society with random encounters

A staple of many games is the existence of random encounters - while traveling from point A to point B, the heroes are attack by bandits/wild animals/monsters/whatever. When defeated, the enemies will ...
4
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3answers
388 views

Stranded in a supermarket. What items will never be useful? [closed]

Let's say you are stranded in an average CVS Pharmacy or Wallgreens in a post-apocalyptic world. While this building has been untouched, there is nothing else around you for hundreds of miles and you ...
76
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15answers
16k views

How can Santa exist when adults buy the toys?

This really gets to me when I watch modern-day Christmas movies. These movies usually present the notion that Santa exists and adults don't believe in him. From what I've seen, it's either because of ...
26
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5answers
11k views

What if an Earth-like planet had no axial tilt? (impact on ecosystem)

The Premise The Earth rotates on its own axis, which is tilted by about 23 degrees. The setting for my fantasy novel is an earth like planet without the axial tilt, all other factors remaining ...
12
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3answers
2k views

What would the world be like after 10,000 years if we all suddenly disappeared?

My story involves everyone in the year 2015 suddenly disappearing. What would visitors to Earth find if they arrived in the year 12015, or 10,000 years after we all disappeared? Assume none of our ...
54
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11answers
7k 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 ...
6
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6answers
17k views

Is a world without any animals except humans possible and what would be the impacts?

I'd like to know if a planet without any animals except humans can exist. The cause of this absence of other species could be anything but the humans should not have any social interaction with ...
3
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5answers
298 views

What would be a naming element convention to distinguish between different carbon-based life forms?

I have an alien race that is carbon-based, like life on Earth, but this alien life uses different essential elements in their biochemistry than those elements used on Earth. I'm trying to come up ...
8
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2answers
617 views

Could an ocean be saturated with something other than salt?

I'm wondering if it was possible for there to be a planet pretty much exactly like earth, except the ocean isn't salt water, it's somethingelse water. Can that happen? If so, how?
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5answers
828 views

Help with designing currency

Imagine Europe around 1810. Imagine the Netherlands. Imagine that it is the colonial age. Imagine also that the colonies are mostly under open rebellion. Imagine that the region of Netherlands (...
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1answer
306 views

Are human batteries energy efficient? [closed]

After watching Animatrix I started to wonder if it would be energy efficient to draw power from human "batteries". Without the Sun there would be no endless - in our time frame - source of power. ...
8
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10answers
2k views

What change in the laws of physics would prevent the function of conventional digital circuits without breaking everything else?

Premise Imagine a slightly more advanced modern day world where space flight was starting to commercialize. Imagine that all of a sudden laws changed and the only thing different is that no computer ...
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9answers
3k views

Gender equality in a fictional world

Most developed country have made great progress toward a better equality between men and women even if it's not yet perfect. Throughout history, some societies where more equal than others and some ...
11
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6answers
3k views

Could a third of the world's population be on another planet in 100 years?

With the technologies that we have got, is it possible to completely migrate 1/3rd of the world's population to another planet which has characteristics similar to those of earth ? Possibly it will ...
10
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5answers
2k views

How would humans have developed without fossil fuels?

I am designing a world where humans have somehow developed or have been put onto a planet in a primitive state. This world has only been habitable for about ten thousand years and therefore only has ...
24
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16answers
6k views

How can I brighten the night sky (just a bit)?

Okay so we have the case: My world is Earth-like(Spherical) Slight fantasy, but also some science It has a normal day-night cycle and seasons I need for a particular area to make the sky somewhat ...
7
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5answers
3k views

How would todays (handheld) guns/ammo evolve in the far future?

If mankind in ~ 1000 years would still use chemical propellants for handheld weapons and their ammunition, how would they improve, given the following: There has been no dark age, but constant ...
7
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8answers
2k views

How to make a world MAD

I have been reading about mutual assured destruction and deterrence theory on Wikipedia, and it got me thinking. What would it take for some of the countries in the world to actually destroy one ...
7
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4answers
4k views

What would life on Earth be like if the Sun was replaced by two blue giants?

Allright, what i'm asking is how life would be like on Earth (which pretends Earth could develop life in the "short" life of a blue giant) if we had two blue giants in the sky instead of the Sun?
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3answers
2k views

What alternate course of technological advacement could realistically have occured? [closed]

Imagine you're writing an alternate history or parallel universe set at present day or possible sometime a little before present day. Being an alternate history technology and society would have ...
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6answers
2k views

How to create a world where birth defects are common and where women are still treated equal to men?

I have a world I'm working on designed to be the setting for an eastern-style RPG. In the past, magic was used until the mana fueling it ran out and everything people depend on failed. At about the ...
14
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23answers
5k views

Weapon developed in modern melee only world

Let's say a global law has been passed in the year 2000 that disallows any projectile, explosive or otherwise long distance weapon or put differently, only allows variations of melee weapons. Thrown ...
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6answers
1k views

Reincarnated into a war-torn world [closed]

My name is Kyoko Nakashima. I was a high school student in Osaka, Japan. I was involved in an accident which reincarnated me to this world. When I regained consciousness, I was told that I was in a ...
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6answers
1k views

How would warfare be different in a world made up of two infinitely large empires? [closed]

Suppose an infinite plane which is similar to Earth's surface and has uniform Earth's gravity field. The plane is devided into two infinite parts by a slightly curved line. On the both sides of the ...
3
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0answers
286 views

Living in a world with no mechanical friction [closed]

What effects would produce living in a world with no mechanical friction, with all surfaces slick and clean?
11
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1answer
4k views

What effect would a red sky and/or sun have on plants and animals?

If an Earth-like planet had an older, red sun — or maybe just a reddish sky due to some property of the atmosphere — how would that affect the growth and/or adaptation of plant and animal life on the ...
15
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7answers
839 views

An enviroment where a bird-like creature can survive on passive feeding

The question about a diet of dust brought up a few creatures that survive on dust, however they were all insect-sized or smaller. This got me thinking about the Blue Whale, which survives on a diet of ...
13
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2answers
1k views

What effect would three moons have on ocean/landscape formation?

I'm building an alien world for a game mod, and want to avoid any blatant mistakes from a world-building perspective. The world has three moons visible in the night sky - two on one side near each ...
12
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2answers
683 views

Centralised continent, with sea/wind currents?

I'm currently designing a large scale D&D based campaign, magic is based on winds and weather coming from two points, the 'northern pole' and the 'southern pole'. Currently the "world" is a ...
11
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5answers
2k views

What would a culture based around light look like?

I am working on an earth-like empire (actually, an alternate-universe Earth with Belgium as the global powerhouse) which, instead of using fossil and nuclear fuels, uses light as their principal form ...
4
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1answer
137 views

Social Implication of Restricting Ecosystem [closed]

Assuming a world with multiple (more than ten) competing sapient species, and assuming that some of these species are restricted to certain ecological conditions, how would one expect political and ...
3
votes
4answers
218 views

Night and light in the reign of the lizardmen

So I'm writing a story on a population of lizardmen who have subdued all the human population. Since lizards spend lots of their time soaking in the sun, I'm not sure how should I go for the night-...
20
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14answers
2k views

Why would you build underground defensive structures in an an alternate world medieval europe?

Assuming a world otherwise like ours and at the same technological level of medieval Europe, what change in the world might have caused people to build defensive structures underground rather than ...

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