Editing Openai/6921ae73-3700-8000-8ab7-90012976bb8a (section)

=== Assistant: Nice, you’re picking the wild ones 😄 ===
Nice, you’re picking the wild ones 😄

The second question I suggested was:

: 

Let’s run with that.

==== Using Einstein’s equation: ====

E=mc2E = mc^2E=mc2
If every bit of rest mass (you, me, planets, stars, dark matter, everything) suddenly became pure energy, you’d get:
* A universe filled with insanely intense radiation (mostly super–high-energy photons and maybe other massless/near-massless particles).
* No atoms, no protons, no neutrons, no electrons as bound matter. Just radiation.

So instead of:
* Stars, galaxies, planets, people

you’d have:
* A glowing, searing ocean of energy.

==== On the small (human) scale: ====
* Every particle in your body turns into energy.
* You don’t explode outward in a normal sense — you just become a burst of radiation.
* Same for Earth, Sun, galaxies.

From any point of view:
* There’s an instant, universe-wide flash of lethal radiation.
* No structures survive — there are no structures; the concept of “solid” or “gas” stops existing.

==== Surprisingly: no. ====

Even though rest mass is gone, energy still gravitates. In general relativity:
* Energy density (including radiation) curves spacetime.
* So the universe would still have gravity — but now it’s a radiation-dominated universe.

This is a lot like the very early universe right after the Big Bang:
* Extremely hot
* Filled with radiation and maybe some massless particles
* No stable atoms yet

==== Right now the universe has: ====
* Matter (normal + dark)
* Dark energy
* A bit of radiation

If all the matter turns into radiation:
* The energy density in radiation becomes enormous.
* The universe behaves like an ultra–hot radiation-dominated fireball.
* Depending on details, it might: - Rapidly expand (still), but with radiation driving the dynamics, or - If the energy density is high enough, potentially recollapse under its own gravity after some time.

But in either case:

: 

==== In theory: ====
* At very high energies, radiation can turn back into particle–antiparticle pairs (like photons → electron + positron, etc.).
* So some of that radiation could recreate matter, like in the early universe.

However:
* It would start from scratch—no memory of previous structures.
* Your body, the Earth, current galaxies, etc. would never reform as they were.
* At best, you’d get a new round of particles, then atoms, then maybe new stars billions of years later… but that wouldn’t be “us.”

==== If all mass in the universe suddenly turned into pure radiation: ====
* Everything (people, planets, stars, galaxies) instantly becomes high-energy radiation.
* The universe turns into a blinding, ultra-hot radiation bath.
* Gravity still exists, because energy still curves spacetime.
* Over time, some matter might re-form from that radiation, but the current universe is completely erased.

If you want to keep going, we can flip it:

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