They were just a few centuries too early!
https://interestingengineering.com/innovation/nuclear-fusion...
If they’d’ve started with turning hydrogen in to gold they’d’ve had more success, and we’d be a space fairing species by now.
If this actually works, I'm going to be convinced that some alchemist overheard an alien dude talking about this but misinterpreted it in line with contemporary knowledge.
Here's a paper, but given the date I have no idea if it was written by humans or by AI: https://arxiv.org/abs/2507.13461
And I guess irradiated gold or a weird gold isotope would be just fine for putting in electronics that is meant to go beyond low earth orbit.
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They were just a few centuries too early!
https://interestingengineering.com/innovation/nuclear-fusion...