After Henri Becquerel's initial discovery in 1896, Marie and Pierre Curie discovered the radioactive elements polonium and radium in 1898; and in 1903, Pierre Curie and Albert Laborde announced that radium produces enough heat to melt its own weight in ice in less than an hour.
Despois do descubrimento inicial de Henri Becquerel en 1896, Marie e Pierre Curie descubriron os elementos radioactivos polonio e radio en 1898; e en 1903, Pierre Curie e Albert Laborde anunciaron que o radio produce bastante calor para fundir o seu propio peso en xeo en menos dunha hora.