We often talk about fusion as bodily a star, but that actually understates the problem.

To make fusion work on Earth, we don't just have to copy the Sun. We have to outperform it.

And in science, there's a huge difference between a process that works and a machine that's actually useful.

Fusion, the perpetual promise.

Fusion power has a reputation.

You've probably heard the joke that fusion is 20 or 30 years away and always will be.

Decades of headlines, massive experimental reactors, and bold promises, followed by the

quiet reality that none of them

power your home yet. That pattern has left a lot of people with a lingering suspicion,

that fusion might be less a breakthrough waiting to happen, and more a scientific mirage.

And that skepticism is understandable, though a bit misplaced.

For the most part, physicists haven't been promising miracle timelines.

What usually happens is a genuine breakthrough occurs, the media overhypes it,

and the public is left to the impression that fusion was supposed to arrive any minute now,

but early on, there really was a period of understandable over-exuberance.

After all, nuclear fission progressed astonishingly fast.

The first controlled fission reactor, Chicago Pile One, went critical in 1942.

Within a few years, fission bombs had ended a world war, and the first commercial fission

reactor was followed in the mid-1950s.

Fusion seemed like the obvious next step.

By the early 1950s, we already knew that fusion powered the sun.

Fusion reactions had been cheated laboratories in the 1930s.

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