212

Housecleaning in Zero-G Think through the amount of body hair and skin flakes a human sheds each week. On Earth, you take a vacuum cleaner or a mop. Still, fluff collects in hard-to-reach places. No big deal, really. The combination of zero-g and artificial life support systems makes fluff a greater problem in space. The solution? Almost-full-body clothing ...


118

Someone detected an asteroid There are lots of small asteroids. Even in 2100, when the solar system is well mapped, carbonaceous asteroids with low albedo will be very hard to detect passively. Further, radar is relatively ineffective for scanning the vast distances between Earth and Mars. A few hours before scheduled departure, a freighter coasting to Mars ...


114

What could be learned? There are so many things you could study by looking at a black hole. There are lots of open or partially unsolved problems that surround them: Does Hawking radiation exist? While it has been predicted theoretically, direct evidence is lacking - well, nonexistent. Stellar-mass black holes aren't the best targets - primordial black ...


112

Not with the time constraint given. Let's start with the most destructive thing we've got: nukes. There are about 15,000 nukes worldwide, of varying yields. Sources: World Nuclear Weapon Stockpile, Plougshares Fund, 2018 Federation of American Scientists, 2018 Assuming an average yield of 200 kilotons, which is what most US nukes have, we could assemble ...


100

Yes, 100% Yes Just because the stranger doesn't know how to build it or how it was manufactured doesn't mean that you can't reverse engineer it. With 10 devices, you even have some spares so you can perform destructive testing on all 10 of them if it gets you enough data to make a replica. This is even more important since it performs the actions of your ...


90

The impact on the Internet would likely be minimal. Now, don't get me wrong. There would be widespread disruption of service to a lot of people who use Google's services. But the Internet is designed in such a way that the existence of any one node or any one link isn't critical to the network itself. In the modern Internet (as opposed to the original DARPA ...


87

A smart gun which only fires in the hands of an authorised individual -- which may include any soldier in your army -- is a useful and practical concept. It may have issues when transferring weapons between units, if someone's fingerprints change etc. A weapon which explodes in the wrong hands is a dangerous liability. It means all a captive has to do is try ...


86

We give the minds some hobbies to do We have lots of people who have literally nothing else to do than think. That will probably be boring for quite a few of them. Why don't we put them to us-... I mean, why don't we just give them something to do that will benefit everyone? A couple researchers will probably want to research further. Let them brainstorm a ...


86

Batteries can be made quite small today, and batteries can be recharged wirelessly by magnetic resonance. So feasibly, the battery could be implanted in the temple near the eye and be recharged by putting a charger against the temple. It might also be possible to charge the eye simply with the light that enters it. If the battery is running low, just stare ...


82

Its already happening Hello dear, I can see you logged to this site and I want to tell you, that I am 18 year old girl and totally not experienced in Worldbuilding, giggles I am searching guy who is gifted in building worlds. If you know what I mean. We can chat online, one to one on this video chat site. And I will show you all my ...


78

For simplicity, let's pretend these are well designed nanobots that don't outright kill their host by blood clots or accidentally ripping holes in capillaries. So let's pretend these great scientists already killed a bunch of small woodland laboratory creatures and got those little issues figured out relatively early on. We'll assume these nanobots are the ...


74

From what is currently happening, it seems a plutocracy (disguised as a democracy or something else) is the most likely next form of government. Advancing technology has freed most people in modern countries from the constant threats of starvation, violence and sickness. They are mostly content with their safe and predictable lives, plenty of freedoms and ...


74

The economy of the world would collapse as business owners everywhere discover that they can fill most of their untrained labor needs for a one time fee of $3000. Those fortunate few who still have jobs would have to buy and customize fembots with military augments and weapons to serve as home defenders against the hordes of starving unemployed.


72

A private network When it comes to flying, the truly rich do not fly first-class. That's incredibly inconvenient for them. The truly rich fly on their own personal jet to wherever they feel like going. Thus, the way teleportation networks would cater to the rich is simple: Have a private network for them. Every major corporate headquarters would have a ...


70

Crowley [a demon] had been extremely impressed with the warranties offered by the computer industry, and had in fact sent a bundle Below [to hell] to the department that drew up the Immortal Soul agreements, with a yellow memo form attached just saying: 'Learn, guys...'" from Good Omens, a book by Terry Pratchett and Neil Gaiman Sell the privacy of ...


65

Why, glucose and oxygen! These have significant benefits: Fuel cells are already available technology, so you can get electricity from pretty much anything that would normally burn. Should be possible to adapt it to work on glucose all right You already want oxygen and glucose in blood. Both are pretty easy to supplement. No real need to store energy, as ...


65

No. Most of the preceding responses have overlooked one relatively-recently identified home for life on the planet; within the crust itself. Researchers have found bacteria up to 4 kilometers down in continental crust and 2 km beneath oceanic crust. Recent estimates are that up to 70% of the microbial life on the planet is, in fact, in the deep biosphere. ...


64

People aren't there to transport Perhaps this space line has an agreement that it won't leave until all the customers have arrived. Given the time between each flight, this might be reasonable though potentially costly in terms of extra fuel required to compensate for a sub-optimal launch time. Technical problems The spaceship toilets are out of order. ...


64

The Russians did it: the Russian Empire, and its successors the Soviet Union and the Russian Federation established Russian as the language for official and inter-ethnic communication. It worked. Georgians, Armenians, Kazakhs, Turkmens, Azeris and so on learned Russian in school and used it as the language of culture, learning, justice, trade and official ...


63

Why does Hinduism not meet your requirements? From Hinduism.SE, neither the monotheistic nor polytheistic labels properly fit Hinduism. You can read the various answers yourself; some answers say it is strictly monotheistic, some say it is both, some say it is neither. However, from an 'outsiders' perspective, one in which all religious practice can be ...


61

Because God or Gods are actually real. Just because some people assume in our modern world that objective proof is lacking, does not prove (or dis-prove) the existence, or lack thereof, of a God or Gods. Also, in your proposed society, there may be reasons for faith, or even proof(s) discovered which are not available to a modern-day type society.


61

There wouldn't be a huge stock left over as we transition unless the transition was extraordinarily fast. Instead, the transition would gradually replace livestock. In the beginning, carniculture (vat-grown meat) would be more expensive than livestock. They would argue that vegetarians who wouldn't eat meat because it involved killing animals could eat ...


60

Okay, so a did a bunch of research into legged robots for my thesis and they aren't going to replace armored vehicles any time soon. The most basic reason, they aren't as efficient in doing what armored or wheeled vehicles are specialized in. They are also very complicated to program, since you have 4/6/8 or more legs which all need to interact versus 2 ...


60

Yes they could. Very Easily. Contrary to myth, the asteroid belt is very nearly empty. (See https://physics.stackexchange.com/questions/26712/what-is-the-average-distance-between-objects-in-our-asteroid-belt for a related discussion.) Planners for the Dawn mission, which spent many years moving through the asteroid belt, visiting both Vesta and Ceres (and ...


58

Most disease suffered by humanity does not affect any other creature And the really cool thing about a plague that threatens to kill everybody if we don't get somebody off the planet (if the words "cool" and "plague" can be used in the same sentence without getting myself labeled a psychopath), is that you have to leave people behind. This gives you a ...


58

Although I like the classic cyberpunk concept that states that nanomachines build a small turbine generator in one of your biggest veins (like the inferior vena cava), I understand you want something built into the eye... What about an enzymatic generator? It extracts energy from the sugars and fats of your body. You can make it tap into the bloodstream, ...


57

One of the ultimate signs of wealth is being able to command services from other humans at your whim. The ultra wealthy have maids, pilots, cooks, drivers, guards, etc. and even if these jobs could be automated, there's still a feeling of power that one can derive from commanding others who are like you, and it's a sign of power to others. So, some ...


56

The scenario you describe could be the result of highly coordinated attack by an ultra-radical anti-technology group that has managed to simultaneously attack and knock out every Tier 1 network provider and every Tier 2 provider on the planet. I'm exceptionally impressed with their ability to pull this off. They have destroyed the world. One could stage ...


55

1 - We're icky There is a hygienic dimension to clothing. As mammals, especially placental mammals, we're always secreting and shedding something -- sweat, oil, hair, dead skin, and many other substances that are unnecessary and inadvisable to list. The areas we cover up are notorious for making right messes, and even the more acceptable areas may be suspect ...


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