Sadly, I don't recall the exact words or source, but it was 'improving' in the sense of continually experimenting. I agree that a lot of late Asimov isn't as g

Sadly, I don't recall the exact words or source, but it was 'improving' in the sense of continually experimenting. I agree that a lot of late Asimov isn't as great as some of his foundational (heh) works.