> It certainly makes sense: you need more complex machinery to form more complex elements. Probably time as much as machinery: in the hyper-energetic early un

> It certainly makes sense: you need more complex machinery to form more complex elements. Probably time as much as machinery: in the hyper-energetic early universe, it would have been harder for matter to get close together long enough to form large atoms. (I just push back slightly because I think complex elements aren't really complex, just big, requiring a stable environment for 'assembly'—but I am a mathematician, not a physicist or chemist, so I wouldn't be surprised to be wildly wrong.)