@paul Re: I Wonder....
Hate to nitpick (actually when I'm right love to nitpick) but iron will fuse quite happily with enough energy and pressure. What it can't do is produce more energy in that fusion than is consumed by the process which, as you rightly say, kills the whole reaction stone-dead in short order.
Either way, earth isn't going to turn into a flaming ball of self-sustained nuclear fusion any time soon.
Biting the hand that feeds IT
