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I've seen a couple questions before (like this one and this one) that ask about the habitability of a planet, with a key part of that being if the atmosphere is survivable. It seems like we should ...
There are a number of stories about persons with exact look alikes. In general this seems to be a rather rare phenomenon. But if you assume more and more humans it should become also more likely ...
In his Robot Series, Isaac Asimov mentions "yeast substitutes" as a way of creating enough food to feed everybody in the Cities. It's also mentioned in Prelude to Foundation. Here's a few quotes fr...
If so, what's the equation (or series of equations) for this, and what variables do I need to take into account? EDIT: the planet in my setting is rather "chilly" (around 9.35 Celsius average) wit...
Simplifying a larger problem. Building a sci-fi text game and I don't want the science to be too wrong. Imagine I have two points in space which are 111,125 kilometers apart and it takes 17 minut...
This is a rather nasty, if rare, brain-eating thermophilic amoeba which lives in warm waters in North America (and elsewhere?). It kills by infecting the brain via the olfactory nerve after it ente...
This is the Bering Sea today... ...and this was the Bering Sea as recently as 25,000 years ago. Truth of the matter is, the Bering had been shifting back and forth from land to sea for 100 mi...
I was wondering if it is possible for life to evolve in a world which lacks any transition metals. I am wondering this because, it could give a plausible explanation for a world which is very unli...
In the event that MOST of the world population were wiped out in a plague / apocalypse that did not directly destroy infrastructure, just killed the people, how long would infrastructure like the p...
Anyone who has a well-versed background in geology will know that the rock of the continents is granite. It forms as lava cools down very slowly, creating large minerals and crystals that shield...
Recently, there have been some great questions pertaining to monomolecular blades and filaments, so I wanted to ask two very essential questions. If we can't definitively answer these, we can never...
Guests of this large space station enjoy Earth-like gravity (80-90% minimum). How? Well the space station is so massive it has its own gravity. The disk shaped "core" is made with ultradense mater...
Think of a giant hemispherical shell, constructed of spaceships, sitting just far enough from Earth to be too far for Earth-based defences and close enough to effectively cast a shadow on the entir...
Could an unmanned solar plane go not only above the clouds, but also so fast that it always is in the day-side of the planet? A solar plane flying above the clouds receives sunlight $12$ hours per...
So, after going through a some rough calculations, I figured my earlier question ran into a few problems regarding the final velocity of the asteroid. I pulled the mathematics a bit incorrect, so I...
So, I ran into a problem regarding the aftermath of a colonial war for independence. What happens is the following: The scenario is this: late 24th Century, humans have colonised the Inner Solar Sy...
My idea was to use 2 stages for an interstellar spacecraft (particularly the Orion Drive) and use it in a way similar to Project: Daedalus. Phase 1 would involve accelerating to cruising speed foll...
I'm not into psychology, but I've heard a lot about veterans who have committed suicide, went crazy, became addicted or have their lives ruined in other ways because of the shock they lived through...
Nobody knows where the big Blue is. Some people say it's a dream. Some people say it's the space between the worlds, where all the things that fall through the cracks end up. The occasional rains o...
Sometimes I reminisce about the giant eagles from The Lord of the Rings and two things come to mind: Boy, I wish I could have my own giant eagle! Could a bird even carry something that heavy on i...
Epimetheus is a planet with about three times the mass of Earth orbiting a sun-like star in the Andromeda galaxy. However, two major factors separate Epimetheus from Earth. First, it has a thick at...
Okay, so the heat death of the universe is approaching. You can't stop it. You can't dodge it. What do you do? You wait it out. According to wikipedia, about $10^{{10}^{56}}$ years after the heat ...
Many authors describe worlds with higher gravity than our own, from whence super-muscular aliens originate. However, as we increased the size, mass and surface gravity of a world; there would be p...
It is estimated that in about five billion years, our sun will enter its red giant stage. During that phase it will expand and completely engulf Mercury, Venus and possible Earth. Earth will either...
To start with, i know You measure the Kardashev scale from stellar success, but lets say we have a civilization that are vastly advanced compared to us, so they are equivalent to a type 2 civilizat...
