That sounds great, but the difficulty in actually procuring ingredients is compounded by the need to make a decision about what to cook, not to mention cooking it without dismembering oneself or creating small fires in an enclosed space.

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Human creativity, it seems, knows no bounds when it comes to inventing new ways to build a petroleum-based fire inside an enclosed metal space and then convert the resulting energy pulse into forward motion.

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Imagine being in an enclosed elevator accelerating up through space, he conjectured in one of them.

NPR: Einstein: Relatively Speaking, a Complicated Life