Examples:
>Space Settlement
A space settlement refers to a permanent human habitat located outside Earth—on the Moon, Mars, or in orbit. Unlike temporary space stations, these settlements are designed for long-term living, with life-support systems, artificial gravity, and even agriculture. They reflect the ambition to make humanity a multi-planetary species and could one day serve as backups for civilization or stepping stones for deep space travel.
>Arcology
An arcology (from “architecture” + “ecology”) is a massive, self-contained structure that combines housing, workspaces, food production, and public spaces into a single building—essentially, a city within a building. Arcologies are designed to reduce urban sprawl and environmental impact, making them ideal for crowded or ecologically fragile futures.
>Floating Cities
Floating cities are large, mobile or anchored platforms designed to float on oceans, built to address issues like rising sea levels, overpopulation, and urban sustainability. These cities would be self-sufficient, powered by renewable energy, and equipped with vertical farming and closed-loop waste systems. They’re like science fiction made real, with some prototypes already in development.
>Space Elevator
A space elevator is a theoretical megastructure that would stretch from Earth’s surface into orbit, allowing materials and people to travel into space without rockets. The idea relies on an ultra-strong cable, anchored to the planet and balanced by a counterweight in space. If built, it would revolutionize space travel by making it cheaper and continuous.
>Nanomedicine
Nanomedicine involves using nanoscale technology (typically under 100 nanometers) to diagnose, treat, and prevent diseases at the cellular and molecular levels. Imagine tiny machines moving through your bloodstream, targeting cancer cells or repairing tissue without invasive surgery. It holds promise for personalized medicine and longer, healthier lives.
Each case is hypothetically feasible.
https://en.m.wikipedia.org/wiki/Space_settlement
https://en.m.wikipedia.org/wiki/Arcology
https://www.dezeen.com/2019/04/04/oceanix-city-floating-big-mit-united-nations/
https://en.m.wikipedia.org/wiki/Space_elevator
https://en.m.wikipedia.org/wiki/Nanomedicine

for all of the very big structures we will need diamond nanothreads and graphene do support the mass of all the wight. sadly we don't have enough to make anything too big at all.
all we need to do is make a compressor that can compact benzene or pyridine at 20,000,000,000 pascal or 2,900,755 PSI. once we have enough then we can do much more.

>>340526
Indeed, there are many limitations that go beyond the mere acquisition and management of resources. Conventional materials are unsuitable for many of these hypothetical projects.
However, some of them, such as "floating cities" or arcological architecture, can be designed with modern materials. These types of cities are currently being tested, and architectural designs have been published.
An example based on "carbon nanotubes" would be:
https://en.wikipedia.org/wiki/Shimizu_Mega-City_Pyramid
https://www.youtube.com/watch?v=-5nFMFvG9SE

>>340819
Nice to see you on the IB bro,haven't see you in a while.

>>340823
Thx, bro. I don't usually log in as much this time of year as I do in the summer. I'm also trying to adapt, my english isn't great (I need a bit of help sometimes). But I try to interact, even though I'm more of a lurker now.

>>340819
Indubitably Uruguay, the limitation of the contemporary material of the modern world will completely fail at supporting such megastructures.
More research in better materials is necessary in order to build such a vast structures. It is inevitable for human expansion.
https://youtu.be/kDA91gvcYfs
https://youtu.be/5vOaprnOEfM

>Space Elevator
Skyhooks are better
Hey, bros!
Since we're on the subject, I forgot to talk about: Space mining.
Some rich people are speculating on this.
https://en.m.wikipedia.org/wiki/Asteroid_mining
https://en.m.wikipedia.org/wiki/Ark_Invest
https://youtu.be/y8Yj1udqV_Q
https://builtin.com/articles/top-space-mining-companies
https://www.startus-insights.com/innovators-guide/space-mining-companies/
Also:
Elon Musk is heavily advertising his Mars colonization, but his rockets will likely serve as tourist freight and logistics (for mining).