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I imagine that if we could transform the Moon into a beautiful planetary ring around Earth, wouldn't it be spectacular! Problem is the feasibility. Are there any practical solutions? Option I thi...
Inspired by this comment: What if every animal as large as, or larger than, a ice-age vintage horse, except for those that are acclimated to cold climates, went extinct during the last Ice Age? I...
Say another Earth orbited the Earth, instead of the Moon. What effects would that have? Would gravity change in relation to the planets slightly during their orbits? I am world building and am tryi...
I am working on the development of a humanoid species. I figured they'd have split along the evolutionary chain around the same time as humans. They'd live in a warm climate, resulting in little ha...
Would any creature ever need to evolve a second (or multiple) brain(s)? If so, under what conditions, why, and what implications would it have on the creature's intelligence? Note that while an o...
In a given fantasy world, I need a deadly (yet not magical) gas that will naturally pool in low depressions and valleys. The level of magic is not high, so I'd like it to be an actual chemical tha...
In a story I'm working on, there are some creatures that eat hair, wool, fur, and anything similar. They're not mites or insects, but are (very roughly) the size of humans. Is there any realistic...
I'd like to tip my hat to this week's fortnightly challenge with this question by revisiting an old one. I asked a question about the Science behind a naturally invisible creature a while ago. At ...
I am envisioning a world around a red dwarf star. The planet has violent and accelerated (due to higher geological activity) plate tectonics and has a magnetic field about 75% the strength of the E...
Let's assume that there is a way to travel into space that's not in a rocket, and a human can essentially just walk/be carried into the upper atmosphere and beyond. Would there be anything that, p...
Assuming that horses went extinct early in history, what would replace the horse, and how would the change in domesticated animal affect the development of the first civilizations? Info on horse e...
Scenario: The Moon disappears slowly -- within 3 days. It is a result of natural causes and we don't have any control over this disaster. What will be the Major Effects On Earth and life on Earth?
Over the course of Homo-sapiens, we have become larger, because of diet & selection. Even in the last couple centuries. Today, we vary across geography and cultures, too, of course. Now it i...
In Pokemon, there are many different creatures. Nearly all of them will, at one point, reach a level of experience where they evolve into a more advanced creature. These evolutions are much more dr...
Faster than light travel is Dangerous with a capital D. The main reason for this is because by the time you see something, you've already smashed into it and vaporised yourself, the target and any...
In an Earth-like world with a moon as large as this: Would the larger tides discourage oceanic shipping?
These questions are a sort of follow up of my question about white pupils. I'm designing some other creatures whose defining traits involve "weird" eyes: How would a creature with oddly shaped pu...
I have made my billions here in the present day, and I'd like to have a permanent underwater settlement. It is about as useless as the Mars One mission (yes, I went there), but some people may c...
This answer to my question about light-as-a-weapon came up with an interesting concept: The Reflecting-Oven-Jay This is a small African predatory bird with a perfectly smooth set of wings ...
If a mermaid was a fully mammalian creature that split on the evolutionary chain about the same time as humans did, would it be likely that mermaids could sleep? Would they rest one half of their b...
A bridge is collapsing, and our poor MC is stuck in the middle. The ground beneath them collapses, but they miraculously are able to climb up the falling debris and safely make it to the main land ...
What are some circumstances that would require a mammal or a reptile to grow another pair of limbs?
Scenario I'm trying to design a colony spaceship. My main character, a soldier, awakes prematurely from suspended animation (SA) to find that the colony ship she is on, headed for Tau Ceti e, is ...
I was considering the creation a long-lived plant which generates harmful (to other species) radiation. If it could be immune to its own radiation, the primary benefit would be that the plants offs...
I'm working on a graphic novel that deals with this particular topic but I'm unsure if something like this can happen. Some Nebulae have a luminosity 1000s of times brighter than our sun while dark...
