Wrapping your brain around the nature of time and the existence of multiple dimensions is a challenge, but comedian-musician Reggie Watts doesn’t blink: he takes on mind-wrenching questions of theoretical physics in a fully-improvised song. Reggie joins Kurt and astrophysicist Janna Levin onstage to puzzle out how the universe works. Recorded live at the Jerome L. Greene Performance Space at WNYC.