“…2) came upon the scene. Within a few months, from April to December 1898, they discovered two new elements, polonium and radium, that they identified solely by the emission of Becquerel radiations [6,7]. In their first publication (April 22, 1898) in the weekly Comptes rendus of the Académie des Sciences Marie Curie reported that certain uraniumbearing minerals, in particular pitchblende, emitted more rays than metallic uranium and concluded, "this fact is quite remarkable and suggests that these minerals may contain an element much more active than uranium itself" [8].…”