News Release 11-217 - Video
Saul Perlmutter describes his Nobel-prize-winning research.
This material is available primarily for archival purposes. Telephone numbers or other contact information may be out of date; please see current contact information at media contacts.
Astrophysicist Saul Perlmutter describes his Nobel-prize-winning research showing that the universe is expanding at an accelerating rate as a result of the mysterious force of dark energy.
Credit: University of California Berkeley