A Wonderful World in the Canopy Guest: Richard Preston, author, "The Wild Trees: A Story of Passion and Daring" Giant trees are the gateway to a rarely explored world teeming with wonder. The Big World of Miniature Trees Guest: Peter Chan, expert bonsai artist The history of bonsai and how an electrical engineer taught himself the this ancient art and became an award-winning expert. The Open Heart Club Guest: Gabriel Brownstein, Professor, English,lSt. John's University, New York City, and author, "The Open Heart Club: A Story about Birth and Death in Cardiac Surgery" Gabriel Brownstein has lived most of his life needing heart surgeries, and he was lucky to get the surgery that saved his life. In his book, he tells his own story, and the stories of the men and women behind the medical breakthroughs that saved his life. Worm-Inspired Glue Mends Broken Hearts Guest: Jeff Karp, Associate Professor, Medicine, Brigham and Women's Hospital and Harvard Medical School Fixing heart defects is a notoriously difficult feat, and existing suturing technology can be dangerous. Jeff Karp, a biomedical engineer, has worked with a team of researchers to develop a new surgical glue. The coolest part? It's inspired by worms!