Superb! First, allow me to note that nearly all of the studies referenced are fully available for close reading. This is outstanding and definitely worth the, albeit significant, effort required to read them. Second, yowsa! A truly fascinating subject. The Author does an excellent job of making the scientific terminology accessible particularly to the lay reader. And as such, makes the write-up even more interesting. One's attention is rapt and kept from beginning to end. The quotes and commentary are exemplary. A brilliant example of truly thought-provoking science reporting. I could go on and on. Do yourself a favor and squirrel yourself away in to your favorite reading spot, allot plenty of time, and prepare to be utterly enthralled by the possibilities. And should anyone attempt to disturb your reading in this instance, give them leave with a cordial but stern - Aroint thee, varlet! Five stars!