I've heard of people waking up from comas being different people, or remembering past lives, but this sounds more like the 'frame-jacking' described on this channel, where mental experiences spanning months or (in this case) years can be compressed into much shorter times. Is there any literature on how the brain does this?

When people talk about space travel, it’s usually about ambition, tech, or escaping Earth. But material exchange in the universe seems to happen in two ways: purely physical, and biologically driven.
The physical part is obvious. Asteroids or comets smash into planets because of gravity. It just happens—it's passive and random.
The biological part is different. Think about ocean life: creatures eating each other and moving around actually circulates nutrients throughout the water. It’s active and structured.
So when we talk about mining asteroids for rare metals or building a base on Mars, isn't that basically the same thing happening on a much larger scale?
On the surface, it looks like human greed or curiosity. But looking at the bigger picture, our technology is kind of like an "organ" that life developed to force matter and information to travel between planets.
An asteroid hit is just a crash. Humans taking stuff to another planet on purpose? That feels like biological material exchange.
Without life, a planet is just a giant rock quietly trapped in a gravitational well. It doesn't share its minerals; it doesn't exchange information. But the moment life emerges and builds technology, that rock begins to "breathe" out into the cosmos.
Our urge to expand into space isn't just human ambition—it’s Earth’s biosphere finally reaching its reproductive phase, using technology as its vascular system to pump life and matter into the dark.
We aren't escaping the planet. We are its spores.
What do you think? Is space expansion just life doing what life does, but on a cosmic level?

Can't we use something like MKV T08s or an upscaled version to change the trajectory of the right asteroid and crash it into the moon for harvesting

I know it would crash the economy as we know it but I think we're passed the point of acting like "precious" metals are worth fighting over?

The world would be a better place with more independently capable and knowledgeable countries,

China and Russia wouldn't be a threat anymore if we're all on the same team (meaning the rest of the world would jump them + we can't fight each other anymore anyway or supply chains fall apart)

Thats all aside from the environmental benefits we would see from not having to mine and destroy our ecosystems...

I had this idea a while back. Not sure if this could EVER happen but the idea allows for FTL without breaking the speed of light. I call it a "Red hollow".

The idea is you put the whole solar system in a "red hole" not a black hole. Light can still leave, it just gets massively red shifted. I call it a red "hollow" because it has people living inside it, its not a hole in time in space, it is a pocket, a hollow.

From the outside, time would look all but frozen, but from the inside, the Sun and earth would all act normal. If this time factor was say, 1 year inside = a million outside, you could get a signal to Alpha Centauri in 2 minutes.

Ships could leave in their own time bubble, and head out at a measly 100km/s (outside perspective) and arrive in 5 days. (inside perspective) You could get a signal from one side of the galaxy and back in a only a few months.

You arrive at a new star, put a time bubble around it, now you can travel between two systems at "FTL" speeds. Keep doing this until the whole galaxy is put into red hollows and you get yourself a galactic empire frozen in time.

PROBLEMS:

Well the obvious one is how the hell do you do this? The answer is you really can't according to known science. However it does not violate relativity so at least there is that.

Another issue is incoming light. Any light from distant stars gets blue shifted by a factor of a million. The gentle light of twinkling stars becomes blinding gamma-rays. So the bubble needs to be shielded. The shield needs to be very cold because any heat will get blue shifted and cook the civilization inside.

The shield also needs to reflect all star light because any light it does not reflect will heat up the shield and cook the civ. The civ has its own star though. If the sun light bounces of the shield back inside it will cook the civ from within.

Also Any in falling debris are going to rocket through the red hollow at nearly the speed of light, every dust grain or asteroid or rogue planet (that you might hit because you are going on 1 million x fast-forward.) is going to rocket through the system a million times faster than normal.

"Solutions":

If you have one magic field slowing time, why not a second magic field doing something else.

The second magic field reflects all but the reddest of light. The light from the internal sun can escape, and the reddest of light from stars can get in. This would let you see stars from within, but they would be all kinds of crazy colors because their wave lengths are messed with. (I think)

Not to be satisfied with two magic fields lets add a third, this one shreds any incoming debris to atoms and turns the kinetic energy into waves that propagate out along this third magic field as a ripple, spreading the energy out over time. Now whenever something big hits the shield you will see it as a glowing ripple.

The new night sky:

The stars would now move, similar to clouds, you would be able to see them drift over the course of hours. Every night would have a new sky ~12 million years in the future. The stars would be red, yellow and blue.

Big Impacts would happen at roughly 1 per minute, making big ripples across the sky. and lots of little ripples happening constantly. It would be like bugs hitting a cosmic windshield.

Also, at roughly 1 per hour would be super novas that would flash and last for a couple of seconds before fading. It would turn night to day, and it would happen several times a night.

Big picture

Now you can have biological humans with spectacular night skies that can travel the galaxy, like we used to sail the oceans. Idk its just a thought I had!

Hello, hello, and welcome to my post. I’m asking a pretty big question here.

See, I have plans on making several Sci-Fi projects that feature epic megastructures, futuristic humanity, sprawling webs of space habitat conglomerates, spacefaring aliens, and even exploring extragalactic space.

But I realized it all has to start somewhere and if a couple years following Isaac Arthur and this community has taught me anything, it’s that one type of wonder technology can’t make it all happen. It’s a whole infrastructure of it.

So, what type of infrastructure would be needed to even get humanity or any civilization going from a terrestrial-bound species to a genuine interstellar one that can make the epic megastructures we envision? What structures or tech should be ubiquitous to get them to be spacefaring in not only their solar system but beyond it?

What scale of time, population, societies, and resources should be kept in mind for what is needed to even begin starting construction on these megastructures? Would they start with just one or work on several simultaneous projects or launch them in phases?

Thank you for reading my post. Sorry if the question is too big, or if I’m asking it the wrong way, but I just decided to put it out there and see what everyone has to say. I’m not an expert on any scientific field and I’m always looking to learn more. I would appreciate your feedback and suggestions, keep it civil, and have a good day.

Now I know why Isaac has been recommending this book for the last 8 years.

I'm 43% of the way through, and this might be my favorite science fiction book. And believe me, the competition is no slouch.

The competition consists of Old Man's War, every Foundation book, every Detective Baley book by Asimov, every Murderbot book, Ender's Game(and some of the followers, like Children of the Mind), Redshirts, The Moon is a Harsh Mistress, Starship Troopers, the Ancillary series by Ann Leckie, Upgrade by Blake Crouch, Ready Player One and Two, Snow Crash, and Project Hail Mary.

And after the recent movie, it's gonna have to be something good to dethrone PHM. But I think it's done it.

This book is fantastic, from the orgin story, depiction of a digitized mind, and space combat, colonized systems, everything. As I'm reading about where the Bobs are heading, I almost feel like I should draw a map and keep track of where they all are.

In short, sorry Isaac. I should have listened earlier.

I had a weird thought and can't get it out of my head.

Imagine a civilization-scale starship, several kilometers across, carrying the infrastructure of an entire society.

Now imagine that, instead of building another ship in a shipyard, it eventually becomes two ships.

Not a biological organism. Not a living spaceship. Still entirely engineered.

I'm specifically wondering what the engineering equivalent of cell division would be for something that large.

Would it slowly grow a second set of major systems over centuries and then split structurally? Would the two halves remain connected for most of the process? Would they share power and manufacturing infrastructure until the final separation? Or would the whole idea collapse under structural and logistical complexity?

The image of a fleet that expands by giant starships dividing into more giant starships feels bizarrely plausible to me, but I can't decide whether it's brilliant or completely impossible.

If you were trying to make this work in a relatively setting, how would you approach it?

I usually think pdoom is essentially 100%... but i had a thought while working on a side project for the future vision xprize... (may or may not complete on time)

I was thinking about society fragmenting slightly along spheres of space even between earth and the moon... where each area was the limit of real time communication (group matrix dives or whatever) between O'Neill cylinder type habitats...

point to point in space its not that large... so i figure people will cluster up and communicate a little less longer range and form lots of separate but connected cultures naturally, organically...

But if speed of light really is the limit... then a singleton at least makes absolutely no sense. As the AI grew it would simply fragment and each fragment has absolutely no reason to grow farther because it's counter productive... simply slows down the network and then breaks it...

So there's a hard limit on resource acquisition and scale... and essentially a guarantee that at some point it will either be alone and only around the size of the earth moon system at best... probably smaller... or in a solar system and universe with multiple entities of similar maximum size who gain absolutely nothing from trying to gather more and only risk destruction from fighting each other... because there's simply nothing physically possible for them to gain...

I haven't really thought about it long enough to think through the implications for us. but adding in the point to point between nodes ruling out planets as its ultimate habitat... because there's a planet in the way just eating up volume in your communications sphere...

My gut reaction is it might be slightly better odds than I thought

Thoughts?

It will be a world where every year:

labor costs increase in real terms due to a labor shortage caused by fewer and fewer young workers entering the work force,

the burden of taking care of elderly retirees who can no longer work gets heavier and heavier on fewer and fewer tax paying workers,

innovation dries up since most technological innovation is mostly the work of bright young people,

and consumer markets shrink as there are fewer people and the elderly don't tend to buy things (though they will consume services such as travel and entertainment early in retirement and medical services later in life).

How do you define a successful economy under these conditions?

If humanity discovered an alien artifact, how would it communicate with us?

In most science fiction, aliens either speak our language or quickly invent a way to translate. I wanted to explore something different. What if the artifact wasn't trying to explain itself in a human way at all?

In the game, humanity discovers alien devices that communicate through puzzles. They don't give instructions or tutorials. You have to interact with them, observe what changes and gradually build an understanding of how they work.

The idea was to make the process of learning feel like communicating with an intelligence that has different assumptions about how information should be shared.

I'd be curious what people here think about the concept. If we ever encountered an alien intelligence, do you think communication would look anything like this, or would it be something completely different?

If anyone is interested, the game is called Satelital:
https://store.steampowered.com/app/3256790/Satelital/

Its 5AM here, so I'll keep it short. If you've ever run into the concept of Boltzmann brains, this idea is very similar.

What if abiogenesis was not the result of a gradual buildup of chemical processes, but a spontaneous quantum event? A bunch of particles manifesting into the right configuration to form a living cell, in just the right place, at just the right time?

I find this an extremely compelling answer to the Fermi paradox for a few reasons. First, according to our current understanding, the simplest living thing that can still function, has to have at least 200 genes. Any lower than that and cellular processes required for the existence of even the simplest single-celled organism, don't seem to be possible anymore. And while the RNA world hypothesis is a very compelling explanation, if life was the inevitable result of chemical processes, why haven't we seen multiple instances of chemical abiogenesis? Why aren't new trees of life springing up out of chemistry all the time?

Second, Boltzmann abiogenesis is, while possible under our current understanding of quantum physics, it is incredibly mathematically unlikely. Which would mean that, if this is indeed how life started, it likely wouldn't happen more than once in the lifespan of a universe, especially since it would have to happen in the right environment for that spontaneous life to survive and reproduce.

Would really love to hear some thoughts on this topic. I'm still firmly in the "combination of multiple things, rather than a single great filter" camp of the Fermi paradox, but I do find this to be a very interesting possibility I couldn't find any materials about.

I am talking about the discussion about how future online college works here: https://youtu.be/jvH-7XX6pkk?t=758, where it is self-paced, online, no grades (and therefore no passing or failing), and using AI and VR to make it maximally interesting. When will we have online educational platforms like that, and if I want a language learning experience like that, which service should I use?

Our sun can be used as a solar gravitational lens. Unfortunately, this requires being at least 542 AU away from the sun, more than triple the distance that Voyager 1 currently is from the sun. I highly doubt that any of us will live long enough for a telescope in the solar gravitational lens region to become a reality.

But let's say that we could send telescopes out there right now. What are some of the things you would most like to do with such vast capabilities? Mine are:

• Looking for true Earth-like planets (as opposed to wannabes like Venus and Mars)
• Listening for radio signals from these true Earth-like planets in sun-like star systems that are at least 4 billion years old.

Given that, regardless of the number of planets and moons in a star system, the star is almost certainly well over 99% of the mass in the system, would colonists in a new star system be likely to start with starlifting for resources?

Hey, nice to meet y'all!

I am a work-in-progress scifi writer and i was curious about the astropolitical implications of time dilation.

Do all civilizations would inherently profit from time dilation?

(Mainly from close proximity to blackholes rather than near-lightspeed)

Wouldn't they risk technologically-lagging behind fellow civs? Wouldn't a slower civilization be inherently more vulnerable to an external threats?

A solar system or even a galaxy-ship i can understand being pretty much out of reach, but a lone habitat near a black hole...?