"I have been a biologist for a long time, and I hope I never stop getting shivers in my spine when I think about the beauty of how we come to know things in biology. Biologists make predictions, then they go out into the field or the lab to see if their predictions hold up. When hundreds of predictions of this sort are fulfilled, a theory reaches the point where it becomes certain, at least on a broad level. And that is where we are with evolution."

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When we cracked the genetic DNA code, opened the big Pandora's box, and it really did become possible to produce chimeras, my ears shot up. Having been brought up among the biologists and having followed various debates about ways to improve the human template and other debates about the true nature of our nature, I began seriously to wonder: What if? We hold in our hands a tool that is more powerful - for good or ill - than any we have wielded before.

— Margaret Atwood