18 votes

Hiding a Continent

Your example is not possible. During the several centuries when sailing ships were the dominant carriers of international trade, they went essentially everywhere. The vagaries of the wind meant they ...
  • 20.6k
10 votes

Hiding a Continent

No, because people just flew wherever they wanted before that. It wasn't till around the 1950s and 1960s that radar and regulations got advanced enough to track most planes. Hobbyists and rich people ...
  • 26.5k
9 votes

Justification for using Saturn as a future base for colonization

Saturn has an escape velocity of 35.5 km/s compared to Earth's 11 km/s. It means you need about 9 times the energy to get to orbit. The maximum temperature is 151 K, which is about 30 degrees colder ...
  • 899
8 votes
Accepted

How to stop Jimmy’s (self-conscious) limbs from rebelling?

Jimmy is a human octopus/arthropod. Jimmy over here is a pretty special fellow, for his species, because unlike humans, whose brains are pretty centralized and coordinate essentially all bodily ...
7 votes

How to get the Lilim to breed true?

Differential chemotaxis Sperm use chemical gradients to reach the ovum. The receptors they use are genetically encoded, and so are the chemoattractant molecules produced by ova. You need to ...
  • 4,117
6 votes
Accepted

If Venus were at .85 AU, Earth at 1.1 AU, and Mars at 1.4 AU from the Sun, would they disrupt each other's orbits at conjunction?

Final answer: the system remains stable. Let me explain exactly what I did. I ran an N-body simulation including the following planets: Venus at 0.85 AU (other orbital parameters unchanged) Earth at ...
  • 3,369
5 votes
Accepted

Are high-density moons plausible beyond the frost line?

Definitely Even if you can find some correlation between moon densities with the distance from the Sun you can find multiple reasons as to why a planet can have a denser moon than the nearest planets ...
  • 145
5 votes

Hiding a Continent

Without changing history, and it being a year-round dry landmass: nearly impossible, however... I can think of two options. OPTION 1: Cyanobacteria covering the entire landmass These are bacteria ...
5 votes

Justification for using Saturn as a future base for colonization

Bad idea First, BillOnne's answer is quite correct - anyone who goes there is staying there permanently, the delta v to get to orbit is prohibitive. Which does not, in and of itself, make ...
4 votes

Hiding a Continent

No What happens if a country decides to violate the agreement and settle the new continent? The international community would have to sanction that county, but do that without saying why they are ...
4 votes

Saturnian Cloud Cities Pt. 2- Ice-harvester planes

I see an inherent problem with the concept of using an airplane when taking off and landing back from above rather than from below. Let me explain: on Earth when an airplane has a non critical issue ...
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4 votes

Saturnian Cloud Cities Pt. 3- Wind Turbine Problems

Objection could be valid, but it misses the important part that those layers have significantly different densities, and are separated by a good deal of km's and what will be harwested is the ...
  • 6,388
4 votes

How to get the Lilim to breed true?

Lilims twin a lot Fertilised lilim ova have a far higher chance of twinning than humans. Around 50%. (Maybe 100%?). Even triplets are common, and quadruplets are only as uncommon as human triplets. ...
  • 5,611
5 votes

How to get the Lilim to breed true?

Chimeras: Your Lilim have a modified form of meiosis. Lilim eggs don’t separate in meiosis. So there is an L egg and an X egg together. The X egg is the one fertilized. If the sperm carry a Y, the L ...
  • 60.5k
3 votes

Saturnian Cloud Cities Pt. 2- Ice-harvester planes

using reactive propulsion in the case loss of water (oxygen) your typical piston based prop would be fine ramjet, with higher speeds of sound in hydrogen the thing has to move at insane velocities ...
  • 6,388
3 votes
Accepted

Would the articulations/joints/bearings of a bulletproof full-body suit be easily pierceable?

You say weight and size isn't an issue but those are absolutely a major issues with modern materials. There's a reason we haven't made any full body bullet resistant suits in real life. I am assuming ...
  • 78
3 votes

Justification for using Saturn as a future base for colonization

Frame Challenge: Saturn itself is a poor choice for colonisation, but some of its moons, Titan and Enceladus in particular, are not bad options. It won't be paradise, but both have a solid surface and ...
2 votes

How plausible is my solar system?

The answer is: your setup is definitely plausible. I have a personal story about this question. Back in 2007 I wrote a scientific paper (I'm an astrophysicist) arguing that very low-mass stars might ...
  • 3,369
2 votes

Saturnian Cloud Cities Pt. 2- Ice-harvester planes

Flying on Saturn is actually quite realistic: https://what-if.xkcd.com/30/ If your aircraft es specifically designed to fly on Saturn, it should have no problems to do so. After all, even the ...
  • 501
2 votes

Saturnian Cloud Cities Pt. 3- Wind Turbine Problems

If not, then what alternative electricity source must I use in place of it? /The hydrogen gas is heated by long geothermal cables that dip down into the lower atmosphere to harvest Saturn's immense ...
  • 287k
2 votes

How to stop Jimmy’s (self-conscious) limbs from rebelling?

Corporal punishment. In the most literal sense. Misbehaving regions are punished by the other members of the corpus collective, in a manner appropriate to the crime and body region. The exact nature ...
  • 287k
2 votes

How to get the Lilim to breed true?

Uterus bacteria Create or preferably alter some bacteria that live in the uterus. These do their normal symbiotic tasks. However, the bacteria are triggered when anything other than a LX has nested. ...
  • 29.7k
1 vote

Hiding a Continent

The Ocean of Death: Obviously, if you are going to have an extra continent, the landmasses need to be arranged differently. On our Earth, weather and such would be altered by an extra continent, so I ...
  • 60.5k
1 vote

Hiding a Continent

Charles Fort was right. Several times, in the course of this book, I have tried to be reasonable. I have asked what such repeating phenomena in one local sky do indicate, if they do not indicate ...
  • 287k
1 vote

Hiding a Continent

Geology that is just right. The center of the island is intensely cold. This naturally makes the air above the center of the island cold, and hence it descends. As it nears the ground it has to go ...
  • 362
1 vote

Hiding a Continent

You only option I think is to have a large volcanic area which undergoes periodic eruption, producing scattered low islands all across its extension. Think of something like Ferdinandea island, but ...
  • 248k
1 vote

Saturnian Cloud Cities Pt. 4- How to deploy the cloud-city

Perhaps the copper block areas include reactors, fusion or atomic, and provide heat for the short term, and are cheap and maybe radioactively dirty in the short term until you get the heat balance you ...
  • 5,795
1 vote

Saturnian Cloud Cities Pt. 4- How to deploy the cloud-city

the materials (graphene cables, algae cells, turbines etc) are carried by rockets You have a lot of kinetic energy to shed if you want to start being in the atmosphere. Usually that kinetic energy is ...
  • 248k
1 vote

Saturnian Cloud Cities Pt. 3- Wind Turbine Problems

A) Deploy gliders, or lots of little drone or kite turbines, or B) piezoelectric 'cilia' or cables that hang below your city. a) Rather than collecting energy from one large turbine, or a wall of ...
  • 5,795
1 vote

Would the articulations/joints/bearings of a bulletproof full-body suit be easily pierceable?

If the plates of the armor are strong enough, then the joints can be protected very nearly as well. Here is how. This is King Arthur's armor from the 1981 movie Excalibur. Note the overlapping plates. ...
  • 899

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