The concept of energy is absolutely central to the description of any physical process, because it is always conserved. Because it can be neither created nor destroyed, all that can happen to it at the most fundamental level is that it is transformed from one form to another. In a sense, this is all there is to the Universe! If no energy is ‘flowing’ – a colloquialism by which we mean ‘being transformed from one form to another’ – then nothing is happening at all. Here is the first step on the road to answering Schrödinger’s question – What is Life? Whatever it is, it is a process by which
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