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I'm not sure if this question belongs here or over on Physics Stack Exchange. The Earth and Moon are unique in the Solar System in that the Moon is a significant size compared to the Earth, at 1/4...
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-...
Electricity pervades our daily lives, and makes possible a lot of technological achievements. Harnessing it helps the development of any civilization. The thing is, water - especially sea water - i...
Currently your work and life schedules fall mostly into 'day' and 'night', with a few areas breaking up work times into 3 part shifts, morning, evening night etc. Imagine we live in an artificial ...
Well, we went and killed ourselves off with our stupid wars. But aliens come along, find our marvelous planet and the evidence that we were here and they find some human (and other) embryos in a ba...
For this question I'm assuming a utterly infeasible technological breakthrough suddenly makes wormholes technology possible. However there is a major catch, the 2D "windows" as they're called don't...
I am searching for a software capable of creating any planet ( like universe sandbox) with the ability of shaping the landscape and adding tags to any coordinates I wish to in order to represent ci...
I have a planet with a stellar flux of 1.118, an albedo between Earth's and Mars's, an atmosphere composition of 18% oxygen, 13% argon and 69% nitrogen with a sea-land pressure of 0.87 atmospheres ...
I have an idea about a person, who knows exact date and time of significant future events. But does not know what is going to happen. And the dates such person knows are significant for culture tha...
I have a race of people who have silver blood. Thing is, I'm really trying to keep it as realistic as possible despite this being a fantasy world. The blood has raw magic energy in it as well, but ...
I'm trying to work out the kinks of an ecosystem on a planet that is rather similar to Earth, but with some species of animal (both carnivores and herbivores) we aren't familiar with in our world. ...
Deep underground, there's a huge limestone cavern, roughly 50m x 100m. It's 250m deep, and completely filled with still water. There is a very small inlet, but the system is now effectively closed,...
Tech level is early Rome, China, Ethiopia, etc. ~ first century BC. Unlike history, there's peace and cooperation among all the benign monarchies of the whole Earth. But it's hard to get daily co...
On an Earth-like planet, there is a massive plateau, standing more than 1km high, and the breadth of a continent in the middle of an otherwise ocean planet. I know there are climactic issues to th...
Could something like this be possible? All humans have been replaced with highly advanced androids, indiscernible from humans, which have been implanted with the memories of the humans they were ba...
In a parallel universe if two objects occupy different positions in space then in the reference frame of each object the other has length contraction and time dilation. If the two objects are very...
Humans sleep more then nearly any other creature (true sleep, not low-activity like cats and sloths), and are some of the only true sapient species on earth. Many other intelligent, or nearly sapi...
I read on the cooking.stackexchange site that all natural salt on Earth was created by seas and oceans, starting with primordial oceans four billion years ago. This got me thinking about my fiction...
Aliens have come to Earth, and decided that the most intelligent life on the planet must live in the water, because it makes up most of the planet. They encounter dolphins and, upon learning to tra...
From a science-fiction development perspective I am looking for some plausible answer for the following: What conditions (the more permanent, the better) would make for a bronze sky? All the bett...
I want to have aliens approach the Earth looking for a new world to colonize. They come from a similar planet circling a similar star, but either their star has entered its red giant phase (how lon...
In the movie Noah, which puts a new spin on the old legend of Noah's Ark, In the movie Cain's descendants mine a ore called Zohar. For those of you that have yet to see the movie, first go watch it...
For a science fiction novel I'm currently writing... The spacecraft in question is based in the asteroid belt and is not designed to approach a planet. The ship has an offensive/defensive capabil...
As we all know, Santa loads his sleigh with gifts for millions of children around the world and sets about distributing them during the night of December 24/25. To make them all fit in his stylish ...
In the book Dune by Frank Herbert. Arrakis is a desolate planet composed entirely of deserts. Water is a precious commodity due to its rarity. The Fremen have found ways to live on its surface, des...
