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In my near (+200 years) future world teleportation has been invented and is now in common use especially for off-world travelling, but it works by creating a perfect copy of the travelling human ne...
What would happen if the atmospheric pressure on Earth would suddenly start to slowly decrease? Let's say that the most precise prediction by scientists is that the air will be completely gone in 1...
Aliens steal all our trees. Nothing else happened, just all the trees are gone. Everything not part of the tree was left where it was (apples are stolen, termites are not.) What would be the short...
So some aliens come, put everyone in space suits, and drop us one the moon. The aliens are super smart, and the space suits have enough air for a year, and can't be damaged easily, and only upon fr...
Let's say some magic aliens come and prank us. They, in one step, remove out the innards of the earth, and put everything on the surface on the inside. They make some artificial gravity so we stay ...
This question asks what if the world was divided into two regions? I'm asking what if the world were split into two planets. Let's say some aliens come to Earth and prank us (apparently they never...
I'm trying to figure out a realistic mechanism to explain a global drought that only lasts for about a decade. Assume an earth-like planet. My goal for this drought is not to have no rain and kill...
Let's start with these assumptions: We're 300 years in the future. The laws of physics are the same as our world, although new rules and understanding have been discovered. (i.e. not quite "hard ...
The basis of known life on Earth is water, clear and simple. But what about forms of life on other worlds? Not every world in the universe is as hospitable as the Earth. Suppose a planet had an av...
I asked a similar question (in a SpaceEx manner) on Space Exploration, but here I've made it a bit more ... worldbuilding. We have a nice Space Elevator, and I'm in charge of the luxury guest acco...
Would a centaur eat meat? Humans do (usually) eat meat, but horses are vegetarians. Would they be omnivores, carnivores, or herbivores?
Background I have a character. He is the master of a particularly specific martial art that is pretty much only movement. But it's pretty powerful, in that he can separately: a) move in a manner t...
A radiothermal generator uses the heat produced by radioactive decay of the radioisotopes contained to generate electricity. The main difference with nuclear reactors is that there is no "reaction"...
There have been countless (literally) stories written that have contained within their pages monsters that are stronger, faster, and bigger than the human heroes. I can think of more than a few wh...
What planetary conditions would have to exist to make computers and other complex electronics useless or at least difficult to maintain? Would ionised atmospheric conditions, constant solar flares...
In Superman IV: The Quest for Peace (imdb) a single strand of Superman's hair is seen suspending a 1000lbs weight. Is is possible to build a space elevator from strands of a super strong human-h...
A class F star (1.4 times the mass of the sun — it has to go supernova) is expanding into the red giant phrase. Its Earth-like planet, with life on it, has slowly been pushed out of orbit as it exp...
I am writing a story that is meant to take place after the death of the sun. However, 7.5 billion years might be a little long for most people to stomach. Is there anything that could cause the sun...
The film Upside Down showed a fiction movie where 2 planets of gravities exists within a fairly short distance. One may also assume that all parts of one planet is parallel to the other, which mean...
Let me set the scene: A team of scientists in their lab one day is told that some miners have discovered some strange new substance. Its properties are extremely peculiar, unlike anything ever befo...
Imagine an alien species arrived on Earth, to find that the nitrogen in the air was toxic to them. Imagine they wanted to terraform our planet, and decided to fix this problem by nitrifying a lot o...
We live on this lovely, assumed naturally shaped almost sphere (accepted as an oblate spheriod) that makes everything really nice and easy when it comes to things like constant gravity and horizon ...
Imagine we're in a world where massive, outrageous amounts of energy are available at our fingertips. Perhaps one of those crazy cold fusion ideas panned out, or we eventually built ourselves a --p...
Most of people knowing a bit about AI know the concept of paper-clipper, an AI that was meant to produce more paperclips and eventually turn the entire universe into paperclips at maximum efficienc...
Assume a universe depressingly like ours, in which special relativity holds. No hyperspace, no warp drive, no wormholes, and even the limited get-out clauses offered by real world physics either do...
