The topic of the origin of life on the Earth is a branch of mineralogy. (p.99)
How did life begin? To be more precise, how did the inorganic chemicals formed in the early years of planet earth, on the molten rocks or in the salty sea or in the methane atmosphere, transform into ‘life’ – complex organisms which extract food from the environment and replicate, and from which all life forms today are ultimately descended? What, when and how was that first momentous step taken?
Thousands of biologists have devoted their careers to trying to answer this question, with the result that there are lots of speculative theories.
Alexander Graham Cairns-Smith (1931-2016) was an organic chemist and molecular biologist at the University of Glasgow, and this 120-page book was his attempt to answer the Big Question.
In a nutshell he suggested that life derived from self-replicating clay crystals. To use…
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