Growing up, Saul Perlmutter just wanted to know how the world worked. In 2011, he was part of the Nobel Prize-winning team that discovered the accelerating expansion of the universe. Saul and Adam talk about how science and knowledge evolve, what surprising emotions come with discovery, and why the combination of individual humility and collective confidence can solve some of the world’s biggest problems. For the full text transcript, visit go.ted.com/RWAG6