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In a world I am building, the planet's days are longer than its years, with a single day taking 9 years. In all other ways, this planet is similar to Earth, but are there other differences I am mis...
In a large body of liquid helium below the lambda point, what would be the best way(s) for submarine like vehicles to achieve acceleration and directional control? I'm willing to accept an answer ...
When a grenade explodes in water, the shockwave does more damage to a human than when the same grenade explodes in air. I am aware that the incompressibility of water as compared to air plays a lar...
Let's use a Mars-like as an example of a planet that interstellar travelers may settle on. Assume that the spacecraft will provide Earth gravity and atmosphere. Comparing this new planet to Earth,...
In my world some people can control wind, including its temperature. Would it be possible to freeze stuff solid immediately (I'm most interested in freezing people, but animals and inanimate obje...
A common theme in older novels and some more modern publications is that of body parts (potentially from multiple species) being 'swapped' on to new bodies and recombined in (usually grotesque) way...
My theory is that if a moon's orbit is situated in between the exoplanet and a second satellite, tidal heating could occur and turn the moon into a sustainable heat source for the host planet. Coul...
If I wanted to image an Earth-like planet at a resolution where one could read the lips of a human speaking on the surface 1, 10, and 1000 light years away, how large would the telescope reflector ...
A hypothetical organism alternates between plant and animal stages over its life cycle. The organism exhibits equally extreme sexual dimorphism. The generations are diplobiontic a la some species ...
A message arrives from several light years away. It is a complete prepared document, not a two-way communication. The document can contain line-drawings and diagrams, both 2D and 3D, plus movies ...
Atlantropa, Herman Sörgel's proposal to turn vast swathes of the Mediterranean Sea into livable dry land by installing five hydroelectric dams (the main one across the Strait of Gibraltar), is an ...
Consider a world where the majority of creatures behave with might-makes-right rules. How could a pacifist race adapt its biological defenses or its society over years of evolution to protect thems...
So to start, let's assume that this hypothetical life form relied on something similar to LNG (liquefied natural gas) - mainly relying on ethane - as a solvent in the same way humans rely on water....
I'm looking for a hypothetical scientific discovery that would make both things possible. I'm just looking for the most plausible scenario.
I have in mind this alien species that can reproduce with humans. The result will always be of the same species as the alien; the human is used only to vary the genetics so the newborn won't be a c...
A large, visible set of rings is the most conspicuous element that sets Saturn apart from the other planets. The whole system is 175,000 miles (280,000 km) wide but only two-thirds of a mile thi...
Assuming we never break Newton's third law, in the near future thousands of chemical/nuclear/electric powered spaceships will be flying through our solar system expelling reaction mass. Since a g...
In an early chapter in my book, I want to explain some of the inner workings of an experimental power plant to the reader. However, I also want to get a certain object (a smart coffee pot) in the c...
This is part of my Alien Message series: Recognizable natural numbers for alien message? Alien message: "Invitation" I recall a TV show featuring a discussion on the design of warning messages ...
Pathogen virus work in a simple way: they inoculate their genes (DNA or RNA) in the host cells and let them replicate huge amounts of the attacker while hampering the host vital functions. As react...
If a spaceship left earth traveling at near or at light speeds (that being possible in this situation) would they not when coming back to earth, arrive many years in the future due to Einstein's th...
In the movie Interstellar, they go to a planet where time flows by much slower for them while on it because of the increased gravity that planet is experiencing due to the nearby black hole. My que...
On a fantasy-themed planet with Earth-like humans and plants, over a very long period of time, a dryad-like species has evolved. Dryads look mostly like regular humans, but they have a few qualitie...
It is a known concept that if ships were to be constructed in space, it would save a lot of fuel and allow for larger ships. My question is, what would be the best location for an orbital "dockyard...
