The theory of natural selection provides a way of understanding how life, starting from one or a few microorganisms, has evolved over time to give us the immense variety and complexity we see all around us now. But it does not, at least directly, tell us how the very first thing that we can call a living organism came about. Natalie Elliot provides a nice survey into what current research says about the origin of life and she says that this research has also resulted in significant changes in what we mean by ‘life’.
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