@Luaan Well, I wasn't suggesting that the MT satisfied OP's conditions... I only said that it existed and gave the parameters of its size.

@Luaan I'm not sure what you're arguing... that the Mariana Trench can't exist? But does? Or that it doesn't count... because it's transient? On some arbitrary timescale? My only point was that OP did not have to theorize about what might be found under the oceans - we know what the deepest and largest fissure is and it's the Mariana Trench.

Gravity will always force the body back into (mostly) a sphere beyond a certain size. See : What is the minimum mass required so that objects become spherical due to its own gravity?

"maybe if you dried Earth's oceans and called the seafloor a crack. Would be mostly shallower than Valles Marinwris" The Mariana Trench, on Earth, is 2550km long, 68km wide, and is over 10km deep at its deepest known point.

@Alexander Sarin kills in one to ten minutes. I'm not sure how much of a hurry OP is in for everyone to drop dead, but it's basically like insect spray for people - it's pretty darned fast.

@AlexP I wouldn't say it's the same at all. Reading a mind might be relatively easy since it would require only observing and transcribing the physical structure of neural connections that already exist in a brain. Writing a mind would require reconfiguring the brain to an entirely new topology with entirely different neural layouts and interconnections. That's wildly more difficult in any context and you certainly can't assume that having the technology to read a mind implies that you can also write one with the same.

This isn't entirely dystopian - lots of countries operate something like this now. The US gives you a social-security number (SSN), every Canadian has a SIN number, every Brit has an NI (National Insurance) number, etc. These all work similarly to what you describe - you need it to take lawful work, to pay taxes, etc. Access to that data is presently quite restricted, so it deviates from the dystopia that way, but it's otherwise a critical registration you need to be a legal citizen. The real world has plenty of examples to draw from.

That extraordinary power also comes with extraordinary damage to the muscles, tissues, and possibly bones. Our body doesn't do it normally because it can be extremely damaging, and generally we don't want that unless the alternative is much worse. When people are electrocuted, for example, it's not uncommon for them to break their own collarbone, which takes much of the stress of every muscle in the upper body going to full power at the same time.

@VogonPoet Well, obviously they don't all work in this building, and clearly that wasn't what I was suggesting. BoA operates in 4600 locations across 40 countries. The point is that a 200-person company did not build this building.

"...employs fewer than 200 people". The Bank of America employs around 200,000 people. Presumably you mean that fewer than 200 BoA employees work in this building.

Really, by the time we have technology that could even contemplate doing this we would have better ways altogether - like more gradually siphoning the energy from the local wind system so that the tornado is not allowed to form in the first place. This gets you two victories - harvesting energy (at a tractable rate) and mitigating extreme climate events. Trying to capture a tornado is like trying to harvest energy from an atomic bomb. Altogether better if you can release the energy slowly... like in a reactor. By the time it's a ball of furious chaos it's too late to do anything sensible.

Just for some perspective, at 10 light-years distance the orbital period of a small brown dwarf captured by the sun would be about 500 million years, meaning the sun would go around the milky way twice before the brown dwarf circled the sun once. Orbital velocity would be around 38m/s, so this would be completely unstable. The smallest perturbation would break the orbit.

Meet the Parrotfish. Whether they feed on coral, rock or seagrasses, the substrate is ground up between the pharyngeal teeth. After they digest the edible portions from the rock, they excrete it as sand, helping create small islands and the sandy beaches.

An animal whose diet consisted solely of sugary foods could not survive. Animals cannot fix nitrogen so we need protein from our food.

@Nosajimiki Well, I, for one, welcome our future high-bandwidth xray communication towers...

No way. SF6 needs fluorine gas to be isolated first and that is both very difficult and extremely dangerous. It didn't happen in our society until well into the industrial revolution (1886), and at that after almost a century of attempts (and deaths) trying and failing. A medieval alchemist would have no hope of success here. The required technology simply does not exist.

TNG 7x16, if you're looking for an example of how others have approached the idea.

This feels like worldbuilding in reverse. You're creating this world. Why would they do this? For what other reason does your story require this plot element? Are you just looking for someone to brainstorm a plot around this oddity for you? Or do you have some deeper purpose that you're not sharing? The quality of answers you receive will improve if you can give some explanation for what you're trying to achieve here.

Air doesn't stick to itself, so tape or glue of any kind won't help. What you're looking for is anti-gravity technology.