We have a remarkably complete picture in many ways - and it could be that we're not accounting for something that's almost three-quarters of the entire universe.

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.