Lawrence Berkeley National Laboratory physicist and dark energy hunter David Schlegel chats with Sabin Russell, former San Francisco Chronicle reporter turned Berkeley Lab science writer. David Schlegel is an astrophysicist at the Lawrence Berkeley National Laboratory and the principal investigator of Baryon Oscillation Spectroscopic Survey (BOSS), the largest of four night-sky surveys being conducted as part of the Sloan Digital Sky Survey (SDSS). Series: "Lawrence Berkeley National Laboratory " [Science] [Show ID: 22550]