Elon Musk (@elonmusk) “@beffjezos I say both energy and mass, as they are separate scarcities for pract” — TopicDigg
Elon Musk
@elonmusk
加入 June 2009
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@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.
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