It’s inarguable that the pioneering work of Marie and Pierre Curie changed the world, for both good and ill. “Radioactive,” the new film starring Rosamund Pike and Sam Riley as the late-nineteenth century Parisians, gives us a brief on the life, and, yes, the deaths, largely due to radiation poisoning, of the couple that is part love story, part scientific procedural and, somewhat strangely, decides to also jump through time (more on this later).