In a universe of non-living space and matter, life is incredibly rare. And in order to stay alive, humans and other organisms have to overcome a myriad of engineering challenges. Just how is this done? And more to the point, is an evolutionary process capable of producing the solutions to these many challenges? On today's episode, host Andrew McDiarmid concludes his conversation with Dr. Howard Glicksman, co-author with engineer Steve Laufmann of the new book Your Amazing Body. The book explores some of your body’s greatest marvels, including how your hearing and vision work, how you coordinate your movements, and — perhaps the greatest miracle of them all — how you developed from a single cell at conception. In Part 2, Dr. Glicksman dives into some examples of the countless challenges life must overcome. This is Part 2 of a two-part conversation.