The “Origin of Life” is a conundrum that could once be safely consigned to wistful armchair musing – we’ll never know so don’t take it too seriously. You will probably imagine that it’s still safe to leave the subject in this speculative limbo, without very much in the way of evidence.
You’d be very wrong, because in the last 20 years, and especially the last decade, a powerful new body of evidence has emerged from genomics, geology, biochemistry and molecular biology. Here is the book that presents all this hard evidence and tightly interlocking theory to a wider audience.
While most researchers have been bedazzled by DNA into focusing on how such replicating molecules have evolved, Nick Lane’s answer could be characterised as “it’s the energy, stupid”. Of all the definitions of life, the one that matters most concerns energy: the churn of metabolic chemistry in the cells and the constant intake of nutrients and expulsion of waste are the essence of life. Information without energy is useless (pull the plug on your computer); information could not have started the whole thing off but energy could.