Â鶹Éç

Heidi Schultz of the Max Planck Institute for Marine Biology describes her discovery of the world's biggest bacteria, Thiomargarita namibiensis, which is pearl-like and visible to the naked eye. What robotics engineers are learning from insects. A new cancer treatment based on how the cassava plant produces cyanide. Brian Greene, author of the bestseller about superstring theory, The Elegant Universe, answers listeners' questions.