Anyone who acquires more than the usual amount of knowledge concerning a subject is bound to leave it as his contribution to the knowledge of the world.
I can't tell you how hard I worked the last year. In fact, I worked so hard that I know I can't maintain that same work level in 2001, so I've got to quit something.
Now an embryo may seem like some scientific or laboratory term, but in fact the embryo contains the unique information that defines a person. All you add is food and climate control, and some time, and the embryo becomes you or me.

