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Three Tidbit Stories

Topic:
Futurism
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Futurism.

3 random tidbit stories in about 3 minutes.

1.

Futurism FAQ.

Is “the speed of light” really the best name for the universe’s maximum speed?.

It’s the c in Einstein’s equation:

E =  mc2

We call it the speed of light, but that name hides what the constant really is. Light is just one thing that can travel at this speed, and it does this only in a vacuum. Other things can travel at that speed too. Interestingly, there are a few things that “always” travel at that speed: the effects of changes in gravity and electromagnetic disturbances.

So, the so-called “speed of light” isn’t really about light at all.

It’s the speed of causation, a fundamental limit built into spacetime itself as seen “within” our universe.

In modern physics, this constant defines the spacetime speed limit: the fastest rate at which cause and effect can propagate. It’s the speed of causality. Nothing carrying information, influence, or change can outrun it.

Light can travel slower because it interacts with matter. Glass, water, and plasma delay light. Gravity doesn’t interact that way, so its effects can arrive sooner. Light sometimes waits. Gravity does not.

This reveals a language problem. “Speed of light” is historically accurate but conceptually misleading. A better mental model is speed of causality, the maximum rate at which the universe allows events to affect other events.

There’s one more wrinkle: space itself is expanding, and that expansion can exceed the spacetime speed limit without violating it. No information travels faster than causality, but distances can grow faster than signals can cross. Any future unified theory will need to account for that distinction.

Since “speed of light” is clearly not the best term, how about we use “universal speed limit,” and many do now. And, define it as “the speed of causation.”

 


I wrote that Futurism FAQ, 

and posted it to TST 8 months ago.

2.

Futurism Story.

Presentient Animals Emerge: The Ediacaran Prelude.

635 to 590 Million Years Ago
Proto-brain; Pre-brain memory; Presentient.

In the deep waters of the late Precambrian, the long road to consciousness took an early step forward. This was a world of strange early animals and other complex multicellular life, a world where the roots of sensing, responding, and primitive biological memory may already have been taking shape. These primordial creatures were far removed from later brains, but they were part of the long path toward animals that could better register and react to their surroundings.

Some of these early species may have possessed no nervous system at all, while others may have been part of the broader evolutionary prelude to later animals with primitive nerve nets and centralized processing. In my broader sense, this was a presentient world: life sensing, reacting, and perhaps retaining simple body-level forms of response before the rise of true brains. In that sense, pre-brain memory was already on the table, even if only in its earliest biological forms.

Pictured: Ediacaran biota (a later Ediacaran organism, about 572 to 541 million years ago). 

The Ediacaran biota was one of the body shapes of the time. It matters not just because it was ancient, but because it represents life experimenting with larger, more complex bodies before the Cambrian Explosion. Their unusual forms, from frond-like patterns to disks and tubes, do not map neatly onto modern animals, yet they help mark the transition from a mostly microbial Earth to one preparing for the rise of nervous systems, mobility, and later consciousness. Whether the pictured organism itself had anything like a proto-nervous system remains unknown, but its world helped set the stage for the richer animal sensing that followed.

 


I wrote that Futurism Story, 

and posted it to TST 2 years ago.

3.

Futurism Story.

The Synapsid World of the Late Permian.

255 Million years ago.

Around 255 million years ago, the land was ruled not by dinosaurs, but by synapsids. This was the age of gorgonopsids, dicynodonts, and many other mammal-line animals that dominated Late Permian ecosystems. Gorgonopsids were among the top predators, with long saber-like teeth and powerful bodies built for hunting large prey. Dicynodonts were among the most successful herbivores, often tusked and beaked, and they spread across huge parts of the world. In a real sense, this was a world where the ancestors of mammals, not the ancestors of dinosaurs, held center stage.

But the Late Permian was not just a synapsid story. Other lines were everywhere. Large pareiasaurs lumbered through the landscape as heavily built reptilian herbivores. Amphibians still thrived, especially in wetter habitats along rivers, lakes, and floodplains. Large insects buzzed through the air, though not the giant dragonflies of the much earlier Carboniferous at their peak. Plant life looked different too. There was no grass-covered world yet. Instead, the land was shaped by seed ferns such as Glossopteris, conifer-like trees, horsetails, ferns, and other hardy plants suited to a warm, often seasonal climate. It was a rich world, but one with a very different cast of life than what most people picture when they think of ancient Earth.

What makes this world especially fascinating is how much of the familiar future was still missing. True mammals had not yet appeared. Dinosaurs were still in the future. Birds were far beyond the horizon. Grass had not yet evolved, and neither had flowering plants, so there were no meadows, no flowers, and no bird-filled skies. The Late Permian was a kind of before-time for the modern world: a planet full of successful, complex life, but built on older evolutionary experiments. Then came the end-Permian extinction, and after that catastrophe, the world would reset. Out of that long recovery would eventually come the first true mammals, the rise of dinosaurs, and much later still, the birdsong and grassy fields we know today.

 


I wrote that Futurism Story, 

and posted it to TST 5 months ago.

The end. Refresh for another set.

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