MUSIC—Experimental, introverted, character-driven, and a little sad: Bill Callahan's music is a mesmerizing sort of modern Americana, from the cattle-ranching depression of Apocalypse to the more domestic, most recent Dream River. Live, he's transcendent, badass, and very, very serious. MS
Aladdin Theater, 3017 SE Milwaukie, 8 pm, $20

SCIENCE—The great, maddening thing about public radio's Radiolab is it can briefly transform things you probably don't care about—what happens to flushed poop, for instance—into the most captivating, interesting thing in your world. Its new live show, Apocalyptical, serves up all that science-y goodness, PLUS the delightful Reggie Watts. DVH
Keller Auditorium, 222 SW Clay, Mon & Tues 8 pm, $41.50-161