Dr. Barrett Klein, renowned entomologist and author of "The Insect Epiphany," explores ways humans have used insects for silk, pigments, food and medicine, and how we recreate their attributes in flight technology and architecture, as well as how we mimic them in music and fashion. Then, National Geographic Explorer Greg O’Corry-Crowe talks about beluga whales, elusive narwhals and a new study regarding a unique species of seals.