In a star system far, far away…NASA/JPL-CaltechBy Leah CraneIt’s a case of pulsar ping-pong. Repeating radio bursts from space may be the result of pulsars colliding with asteroids in faraway stellar systems. Fast radio bursts (FRBs) are a rare and mysterious phenomenon. Until recently, we had seen fewer than 20 of these milliseconds-long pulses of...