Green LED light can assuage the pain for people with chronic migraines. Then, a rapping molecular biologist works to make science not just more diverse but also more effective. And, telehealth is becoming the go-to for many doctors and their patients. Also, on today’s show: lithium batteries have a painful cost for us and our environment; fences shape ecosystems; the Yellowstone supervolcano might not erupt as soon as we once thought.