Saul Perlmutter: 'Science is about figuring out your mistakes'
Nobel prize-winning astrophysicist Saul Perlmutter is featured in the British national paper, The Guardian, in the "Rational Hero" series.
Perlmutter is an astrophysicist at the Berkeley Lab and Professor of Physics at UC Berkeley. He talks about his discovery that the universe is expanding at an accelerating rate and why he isn't afraid to fail.
Every month The Guradian features a scientist in their "Rational Hero" series who discusses their work, struggles and achievements. Read more.