Don’t let this low-budget indie get crushed by the summer behemoths. Another Earth offers imagination and provocation to spare. By way of plot I’ll say only this: Scientists have discovered a replica of Earth orbiting the sun. This is a game-changer for Rhoda (Brit Marling), an MIT student whose drunken joy ride resulted in the death of a pregnant mother and her son. Only the husband, music professor John Burroughs (William Mapother), survived. Can another Earth offer Rhoda salvation or just deeper damnation? Newcomer Marling, who wrote the artful script with director Mike Cahill, is a talent to watch. She and Cahill have crafted a mesmerizing mind-bender to haunt your dreams.