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Updated: September 19, 2025
The method of analysis founded by M. and Madame Curie has enabled other bodies presenting sensible radioactivity to be discovered. The alkaline metals appear to possess this property in a slight degree. Recently fallen snow and mineral waters manifest marked action. The phenomenon may often be due, however, to a radioactivity induced by radiations already existing in the atmosphere.
This conception of the molecules and atoms as the ultimate units of which matter is composed maintained its place until the discovery of radioactivity and its associated phenomena, about 1896; since which time we have definitely ascertained that even the atoms are separable into still smaller units, and that possibly these units are all alike.
Then there came a soft rumble, as of water beginning to boil in some huge, but distant, samovar. It seemed to go on and on and on. And there was a bluish, fluctuating glow on the horizon. Radioactivity? Wang wondered. Surely not an atomic-powered ship without safety cutoffs in this day and age. He pulled out his radiophone and thumbed the call button again. This time, there was no delay. "Yes?"
"I think not. They can, of course, detect any wave at almost any distance, and at the first sign of radioactivity they would locate and destroy the bomb. They also, in all probability, would destroy us. I would not hesitate to attack them on that account alone, but we must remember that we are upon a more important mission than attacking one hexan ship.
"And Hradzka has returned to a time when such immunity did not exist? But would that not be to his advantage?" "Remember, General, that man has been using atomic energy for ten thousand years. Our whole world has become drenched with radioactivity. The planet, the seas, the atmosphere, and every living thing, are all radioactive, now. Radioactivity is as natural to us as the air we breathe.
The discovery of radioactivity seemed to promise endlessly extended life to our sun, but Sir E. Rutherford, before the Royal Astronomical Society, has roundly denied that the discovery materially lengthens our estimate of the sun's tenure of life and has said that if the sun were made of uranium it would not because of that last five years the longer as a giver of heat.
We have only begun to know of X-rays and the alpha, beta, and gamma rays from them, of radium, radioactivity, and finally of this new force which I have discovered and call 'protodyne, the original force. "In short, we find in the universe Matter, Force, and Ether.
The conclusion which our minds are forced to draw from the facts presented in this chapter is not doubtful, nor is it difficult to state. Matter is not now being brought into existence by any means that we call "natural." And yet the facts of radioactivity very positively forbid the past eternity of matter.
It went briskly off into the distance toward the north. Joe was amazed, but comprehending. The vehicle and the men were armored against radioactivity. They would approach the dead man from upwind, and they would scoop up his body and put it in the lead-lined bin, and with it all deadly radioactive material near him.
This fact, seen together with the characteristics of radioactivity, tells us that in such elements gravity has so far got the upper hand of levity that the physical substance is unable to persist as a spatially extended, coherent unit. It therefore falls asunder, with the liberated levity drawn into the process of dispersion. Seen thus, radioactivity becomes a symptom of the earth's old age.
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