A loophole for surviving the heat-death of the universe, or a noose?

3 October 2025

The people at Kurzgesagt are pretty clued-up. They must learn a lot, about everything really, in their line of work. As a result of this ceaseless learning, they might have found a way, for whatever lifeforms are still present, to evade the eventual heat-death of the universe.

Although still conjecture, this is how the universe might “end”, in trillions of years hence. Long after the last star has stopped shining, long after the last black hole has finally disintegrated.

Under this scenario, the universe won’t, or isn’t expected to, collapse in on itself. Seemingly the cosmos will continue expanding forever, as a dark, cold, void.

This, however, appears to the ideal environment for eternal life. In short, a civilisation Kurzgesagt calls the Noxans, will harvest vast amounts of energy from their galaxy, or what’s left of it. This will be stored in a massive battery bank, which the Noxans will draw off for untold trillions of years.

Untold trillions of years, but not forever. This near eternal life, however, won’t be living as we know it.

The temperature in the universe at this stage will be barely an iota above zero degrees on the Kelvin (K) scale. For reference water freezes at about two-hundred-and-seventy degrees on the Kelvin scale. Zero degrees K, or absolute zero, will be pretty cold. Too cold to even play ice-hockey.

But the Noxans will not be particularly active. Their digital avatars, which is all that will remain of them, will spend their waking hours engaged only in thought.

They will need to slumber to conserve resources. But this off-time will aid in cooling them down further, in turn reducing their power needs, in turn extending the life of their batteries. Didn’t the Noxans do well, surviving trillions upon trillions of years after the universe’s heat-death?

Kurzgesagt calls their method a loophole, but it seems more like a noose to me.

I’m curious as to what sort of material the battery banks, and whatever structure the Noxans will “reside” in, are made of. How will these endure for eternity without repair or replacement?

But sitting around in an ice-box until the battery goes flat doesn’t seem like fun. There has to be a better way for a civilisation to live forever. And maybe there is.

The Noxans, it should be pointed out, are what’s called a Type III civilisation on the Kardashev scale. This means they’re able to harness all the energy within a galaxy.

In comparison, Type I civilisations control all the energy on their planet, Type II their solar system. Humanity might be considered a zero-point-seven civilisation. But when Nikolai Kardashev, a Soviet astronomer, draw up his scale in 1964, he did not venture beyond Type III.

Other people though, including Hungarian academic Zoltan Galántai, speculate the existence of Type IIII, and even V civilisations, may be possible.

A Type IIII civilisation would have all the energy of the universe at its disposal. Type V entities meanwhile could probably create a whole new universe in which to live. This seems like a better plan for the Noxans. If they’ve made it as far up the scale as III, they could push on higher.

Reaching the ultimate top level, in this case V, would be a challenge, as I’m sure any gamer could tell you. But if the Noxans start now, with potentially many, many, trillions of years in front of them, I’m sure they could do it.

Eventually freezing to death in a glorified refrigerator seems like an absurd idea in comparison.