Radium Quotes
The lecture was on radium and the radioactivity that scientists had recently discovered. This appears to be the first time a scientist suggested the possibility of using atomic energy to produce a powerful weapon. At the same time, note that he also mentioned the possible destruction of the earth. “Heavy matter” referred to the elements—many of which had not yet been discovered—that had larger atomic numbers than radium like uranium.
This problem is still with us. Nuclear proliferation, dirty radioactive bombs, and terrorism are potential down sides of radioactivity.