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Assume there is a point in time when every planet in our Solar System consists of colonies. Each colony is inhabited with civilians that primarily serve the purpose of its colony. Some colonies m...
If half the earth was made antimatter and contacted the other half all at once, would the resulting energy be enough to "destroy" the observable universe? I did some math based on the mass of the ...
Purely geography only. I'll break down into points. What I'm giving you below is just to narrow down the possibility, but otherwise, quite arbitrary. Assuming a large archipelago of islands exist...
In my world, a 16 year old boy has gained ghost-like properties, invisible to the naked eye and able to flit through objects as if they were not there. Like a man trapped in a room with an endless ...
I am trying to design spacecraft with realistic mass estimates, so that I can "accurately" design fuel requirements and calculate potential speed. Obviously the mass of a ship is going to vary wid...
This character is an elf-human hybrid, who can travel long distances at high speeds with little rest. She can run at top speed (what we call sprinting) without stopping to rest, sleep or eat for th...
The hero of my story has been cursed to be forever 'bloodthirsty' in the literal sense of the word. Effectively, he has been turned into a vampire. But drinking blood will cause him to lose his sen...
I would argue that ants are one of the most dangerous, effective and successful creatures on earth. But as we know they are not the dominant form of life. They also vary through-out their many spec...
The aliens in question aren't of a hive mind in the strictest sense (instead of many drones answering to a leadership caste each organism acts as one cell, all of them are essentially 'the same ran...
Suppose that there is a race of intelligent being (actually not as intelligent as human but it isn't important) with great bat-like wings that let them fly. They are a bit smaller than the average...
I just wanted to know something relatively simple. What evolutionary factors could lead to an alien prey species to develop human like intelligence, and by prey species I mean a species like bunnies.
All work and all play makes Jack a distributed boy: Jack is at the hotel reception with his wife. Jack is also in the office, meeting with unspecified forces for inscrutable purposes. Jack is also ...
Moon's surface is about thirty million square kilometers large. That's a lot of plastic, but no bigger effort than many other terraforming projects we have discussed. Description: A global bubbl...
Okay, as an extension of my previous question, I'm just going to lay bare all the details I've written down about this planet (including corrections from my last question), and ask the big question...
One of the benefits of humanity is our subconscious need to explore. It is a simple instinct of primitive people wanting to know, not only what is in your territory, but almost what is around your ...
My binary planets are roughly the size of earth and they are tidally locked with one another. Both planets support life. If the day/night cycle is roughly 100 hours (50 hours of day, 50 hours of ni...
Any ideas how an advanced alien race could speed up time in a specific region of space? I'm working on a storyline in which an alien race uses a time bubble to accelerate time so the construction ...
I am still puzzled by the original The Planet of the Apes movie from the 70's. How come that sentient species invented weapons, but was unable to develop powered flight, or spacecraft. Thus, the qu...
So I want my planet to have six suns, but I'm not sure how far apart these stars would have to be from each other to not produce adverse effects on the planet that would prevent life from developin...
Imagine a world in which earth has started to colonize other worlds slowly, though the expense to send ships to other worlds is extremely high, and without FTL drive it takes some times to create a...
Having somewhat successfully raised bamboo plants myself, I know that they're hardy plants. However, our moon is a pretty different story. If we were to bring bamboo to the moon and maintain a smal...
Ok, so I have determined my world can keep it's planetary ring system. YAY! Now I just need to clarify once and for how it would look like from the planet surface. I think I have it worked out, but...
In the Mass Effect series there's a terrestrial planet called Dekuuna with 10 times the mass of Earth, a surface gravity of 4G and a native intelligent race. I was just wondering if it was possible...
There are a lot of answers on Worldbuilding about how to destroy planets - just as an example - and they seem to be the method of choice for many people intent on destroying the world. My objection...
There is a planet that is orbiting around not a single star, but the core of a galaxy. It is independent of the other solar systems in the galaxy, but is affected by the center of mass of the core....
