If you ask almost any of them, 'Do you stand behind your theory? Is this the answer?' I think almost everyone would say, 'No, no, no. I'm just trying to expand the range of possibilities.' We really don't know what's going on.

Schmidt. The advertisement showed his passion for the study of the cosmos at even a very young age. Saul Perlmutter (born September 22 1959) is an American astrophysicist at the Lawrence Berkeley National Laboratory and a professor of physics at the University of California Berkeley.

Schmidt and Adam Riess for providing evidence that the expansion of the universe is accelerating. He is also a member of the National Academy of Sciences.