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RT Elon Musk: Re @beffjezos I say both energy and mass, as they are separate scarcities for practical purposes, despite being technically “equivalent…
RT Elon MuskRe @beffjezos I say both energy and mass, as they are separate scarcities for practical purposes, despite being technically “equivalent”, as described by Einstein’s famous equation.Our solar system has only a tiny percentage of non-solar atoms with which to build things.