human
That is the most remarkable thing on earth, went on Leighton, heedless, in his excitement, of the frivolous comments of his companions.
gpt
I have often thought that sooner or later something like this would be discovered. It is impossible to estimate its value. Why, all the billions of dollars that there are in the world to-day could not pay for it at the present market prices.
human
What is it?
gpt
Radium!