Hr2: Antibiotic Discovery, Regrowing Sensory Hair in the Ear, Trappist-1 Exoplanets

Scientists have discovered seven Earth-size planets orbiting a nearby star that could hold the conditions for life. Plus, a look at the scientific obstacles and breakthroughs involved in finding and developing new antibiotics. And Boston-based researchers have regrown a high volume of sensory hair cells in the lab using a new technique.