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Bringing a human child to term generally takes place over a period of nine months. They are marked by different stages, from 1st to third, and are marked by different events and expectations for mo...
Assume planetary-scale cables are easily constructed, and subsequently ignored. I am assuming these cables would run just under the surface of the planet from one side to the other for minimal mai...
I was thinking of creating an alien planet that orbits a star slightly past the habitable zone, but is kept warm by an extremely dense atmosphere, made primarily of a black gas, but still contains ...
We already know how to heat things up, but what about cooling them? How do we make Earth's climate like that of Mars? Or go further: can we, by any hypothetical ways, make Earth somewhat like Pluto?
So, I have been a bit disappointed with the answers on how to store degenerate matter from my previous thread, and now I'm even wondering whether one can produce it at all, without invoking unreali...
In a not so different fantasy world, whose physics and thus are similar to our own how would including penguins affect the look and function of a typical arctic ecosystem. For the purposes of this...
I've been working on a sci-fi series set about 1000 years in our future. The discovery of an alien threat leads the ruling government to conceive of a doomsday machine, which they hope will be so p...
In my world, a hyper-intelligent AI has struck out on their own to form a perfect, mechanized empire, populated by loyal robot citizens, devoted to the overlord as a child would be devoted to their...
As the tittle says what would the ecosystem look like if predator and prey were to switch places? The cause of this change is either handwavium or a very unlucky sorcerer. The transformation is mai...
If it were possible to build a giant geodesic dome tens of miles in diameter, what effect would it have on nearby weather? If built in an arid climate like the Sahara or Australia, would it be li...
Is it plausible that a virus could contaminate the entire ocean to where humans that enter it are highly likely to contract the virus? It doesn't necessarily have to be the whole ocean what with th...
In the movie, Arrival, there is an advance alien race that arrives on are planet, with a few landing in specific places. The aliens species are called "heptapods" (by our standards). They have 7 a...
Radiation is the ultimate bane of all organic life. Its particles punch holes in our DNA, causing mutations and giving us cancer. But, is there a way to make an organism that is unable to get radia...
There is a secret ship and it is used by pirates as a recharging point. It has a nuclear reactor as a power source and other ships are using electricity. Let's assume in this world stealth technolo...
An alien automatic "beacon" tries to warn us about some imminent danger. It does so with launching a succession of large "veils" in front of their star so we can detect them via the transit method....
In the waters of Iceland, the natives have their own word for a particular brand of cetaceans--"Illhveli", literally "evil whales". And the bloodthirstiest of them all is Raudkembingur, Icelandic ...
Inspired by this question, which is asking how to deny land for several hundreds of years after a global nuclear holocaust, I would like to know, given only nuclear weapons, and especially salted b...
I'm attempting to flesh out the history to a sci-fi novel I'm currently writing, which is set in the future. Several hundred years prior to the beginning of the story, lack of resources lead to s...
What I'm looking at doing is a small game where you land on a planet, and the atmosphere is not survivable by a human being, but there is local life. Over the course of the game, terraforming has t...
In my fantasy setting, slimes are a species of giant (about eight cubic feet), single-celled amoeba. They have the ability to freely change their state and viscocity, being able to "melt" into a sl...
In a scenario where the Soviets didn't manage to stop corium from reaching the water reservoirs underneath the plant, causing a detonation equivalent to a nuclear explosion, what would life in the ...
In my current writing project, I'm working in a universe where mysterious alien beings travel not directly through space, but through planetary atmospheres via wormholes. These aliens shotgunned th...
I've got an intelligent, stone-age species that looks a bit like an Azhdarchid pterosaur. It is around the size of a large eagle. They have a proboscis and a finger on each wing used for manipulati...
This is a bit of a continuation of my previous question, could a form of acoustic levitation be used as artificial gravity? In that question, I referenced how some scientists use acoustic levitat...
What is a possible event${^*}$ that would cause a spike in the speed of $^{235}$U fission and reduce its average concentration in ore worldwide? As I understand the physics of the process, it is i...
