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If Earth would have been sucked into black hole. Would it be crushed by gravity pressure or not?
We all know that Titan has an atmosphere that consists mainly of N2. What I want to have is a planet with an atmosphere that consists mainly of various nitrogen oxides (NO, NO2, N2O). My question...
Whether life is carbon based or something else, we are presuming that the fundamental units are extremely tiny. We need metabolism where parts are made or modified (by existing parts), which (if na...
I've got a planet with a very special atmosphere. The properties are as follows: Surface pressure = 0.7 atm Composition: 60% NO 20% NO2 10% N2O 5% N2 5% O2 traces of CO, CO2 My question is: ...
I totally get why humans who have colonised a low gravity environment (Mars or an asteroid, for instance) are skinny. Muscles doing less work, square cube law, force output of a muscle proportional...
Related to this question on the topic of merfolk. What would be the consequence of higher oxygen level in water? As far as I know it is at 14 to 15 mL per liter with a water temperature at 0°C. (...
In some of my first questions on this site I asked about a world with a day that lasts 9 years. Many people agreed that life on this planet could survive via migration, but not evolve.The problem l...
I have an idea for this crazy blood thirsty monster and the reason behind its love for killing is red is the only color it sees, but I don't know how or if that is possible a logical scientific exp...
Let's pretend the clouds got there via magic or some bizarre scientific experiment gone wrong. The why isn't important for the question. Question: How would the earth be affected if its entire sky...
I am writing a book, and I want to create either a sentient fungoid or plant and I wish for it to use hormones instead of neurons to transfer information. I'm not sure how this would work and affec...
So, I've got a planet with this atmosphere. The composition is: 60% NO 20% NO2 10% N2O 5% N2 5% O2 traces of CO, CO2. The surface pressure is 0.7 atm, temperatures range from -30 to +30 degree...
In a setting I am presently working on, I have envisioned a world similar to Star Wars' Takodana, in that its water is mainly in the form of large rivers, or smaller seas (I generally picture it b...
Can asteroid fields ever exist locally in a system, or do they tend to form belts exclusively? And by asteroid field, I mean clusters of asteroids scattered around a planetary system.
Assume that this earth is celestially equivalent to ours: e.g. same solar system, same position, same orbit, etc. Would the sunset look similar to ours on a floating-island earth? The earth itsel...
The main reason I ask this is because my world's moons both have long periods of darkness based on their phases (see here) so plant life needs to have a way to persist through such a lack of light....
I've recently been replaying Skyrim (for about the fifth time now), and I've stumbled across something I thought would make for an interesting question. The Greybeards are a group of extremely pow...
In this scenario, an underwater city is a collection of domes interconnected by tunnels 17 feet wide and 17 tall. The largest of the city's domes is 71,000 square feet in area and 137 feet tall. ...
Recently I have become obsessed with the idea of twin sapient species developing on separate planets of the same horseshoe orbit. As I was considering the technological advancement of this planet, ...
The popular image of a mermaid is a half-fish, half-human creature breathing fine above and below the surface. The only real-life analogy to this are the amphibians - frogs, toads and salamanders. ...
In my world, I want to create cultures resembling cultures of old Earth ages. This applies both to state structure and culture. (e.g. ancient Egypt revival) Since this does not happen spontaneousl...
On my planet, the whole day lasts nine years. The day lasts 4.5 years of incredible heat, with glaciers from the night providing water. The night starts with the sunset, during which violent tornad...
These settlers live on a planet, which surface temperature and pressure are compatible with human life. However humans cannot breath its atmosphere. The gas in the atmosphere is not necessarily tox...
I've drawn up a set of landmasses for my story, and now there's a tsunami headed for them. I know where the tsunami is coming from, and I could decide how big it is, or any other characteristics o...
I have a group of ecoterrorists who want to limit the amount of CO2 the world puts out in a drastic way: by poisoning oil fields so that the oil becomes unuseable, or at least forever uneconomical ...
Here on Earth, Carbon is the base of all life from plants to fungi to animals. The most common alternative that exists is Silicon, but surely out of the over 100 elements other than Carbon and Sili...
