I love this book - I'm almost finished with it. In every chapter, I've been highlighting things. For me, this was easily understandable, not being a scientist myself, although I work with them everyday.
The whole idea, to me, was fascinating - you can't stop the progress of "man", once our species had speech, a bigger brain, hands to grasp, and upright posture. Sometimes, progress is not good, but it cannot be stopped - man will always "quest" for something new.
I often think these things are bad - cloning - why do we need any more people in the world? But, our species will do it, nonetheless!