Today we are more aware than ever that our environment is changing, but what happens if we intentionally alter it? MIT’s Kevin Esvelt joins Cross Currents to discuss how he and the Sculpting Evolution Group are using genetic alterations to fight disease. 40% of Nantucket residents have had Lyme disease, and he may have a solution. Kevin and his team want to genetically alter wild organisms – mice – and release them into the environment to kill off the tick population that carries Lyme. Then, the adventurous author Crocker Snow Jr. discusses his new book Nantaska, which takes a stunning look at the similarities between the small island of Nantucket and the huge expanse of Alaska.