One of the miracles of nature is embryogenesis: the transformation of a single fertilized egg cell into an embryo that will eventually become a fully formed baby animal. Various analogies have been applied to this process, from the primitive concept of a blueprint to Richard Dawkins’ cake recipe that calls for genetic ingredients. To my mind, the best analogy comes from Gary Marcus’ 2004 book The Birth of the Mind: How a Tiny Number of Genes Creates the Complexities of Human Thought. According to Marcus, embryogenesis most resembles a genetic computer program that produces a three-dimensional living organism. Marcus states that every gene is like a single line of code. All the genes together form the master DNA program, which is copied and run simultaneously in trillions of cells to achieve this miracle of physicochemical engineering.To read more, click here.