Katie Colaneri looks at Berkeley, California’s soda tax, in anticipation of Philadelphia’s. Anne Hoffman reports on the racial disparities in mental health services for children. Mark Eichmann profiles Republican State Senator Colin Bonini, a candidate in Delaware’s upcoming gubernatorial primary. Brad Linder talks with Villanova scientists Edward Guinan and Scott Engle about the possible habitability of newly discovered planet Proxima B. Peter Crimmins speaks with a music theater team who met through an online matchmaking site. Howard Shapiro reviews “Cake Off,” at the Bucks County Playhouse.