1. From our point of view, the most exciting thing would be if we discovered something really fundamental in our understanding was just off a bit — and that now we have a chance to revisit it. That would be our favorite thing, if we could take a whole new crack at the problem — and a new way of understanding it. In physics, it seems like whenever we get a completely new understanding … it somehow subsumes the previous understandings and it … adds an extra level of sophistication.

    — Saul Perlmutter, on his (shared) discovery that the universe’s expansion is speeding up and not slowing down, as previously thought. 

  2. saul perlmutter