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Updated: June 19, 2025
Those films would have to be well-buried, to shield them from radioactivity. We can expect that it will take some time." "All right. I'll be back as soon as I can." The helicopter turned and went windmilling away, over what had been the Golden Triangle, down the Ohio. Altamont went back to the little concrete bunker and sat down, lighting his pipe.
These two substances, developed synthetically in much the same manner as ordinary ultron, exhibit dual phenomena which for sake of illustration I may compare with certain of the phenomena of radioactivity.
And this, as we have seen, is just what modern discoveries in radioactivity are teaching us regarding the make-up of the substances that we call matter. But an objection at once arises. How can these primordial units of which matter is composed behave so differently, if they are really alike, mere duplicates of one another?
Baxter took the cement bag and folded it neatly, then he took a plastic bag from his case and put the cement bag inside. "I can't be sure," he said. "About its precise identity, I mean. But it seems to be pulverized ore, and my guess would be carnotite. Don't worry about the radioactivity. You could live in a house made of this stuff and it wouldn't be dangerous. The level of activity is very low.
Rip took his astrogation instruments and made a number of sights. They looked good. The first blast had worked about as predicted, although he wouldn't be able to tell how much correction was needed until he had taken star sights over a period of five or six days. "Let's go home," he ordered. Back on the asteroid, a pit that glowed with radioactivity marked the site of the first blast.
They could move to the dark side as they approached the orbit of Earth. By then the radioactivity from the blasts would have died down considerably. He was selecting the location for a base when Dowst suddenly called, "Lieutenant Foster!" There was urgency in the Planeteer's voice. "What is it, Dowst?" "Sir, take a look, about two degrees south of Rigel!"
There was one subject on which he was particularly eloquent radioactivity; that most strange property of matter whose discovery had been the crowning glory of science in the closing decade of the nineteenth century. None of us really knew anything about it except what Stonewall taught us.
In a matter of seconds the four spacemen were rocketing over the jungle toward the Polaris. Presently they came to an enormous dust cloud that had mushroomed out over the trees. It was so thick Tom found it difficult to pilot the small craft. "Any danger of radioactivity in this dust, sir?" asked Astro. "Always that possibility, Astro," answered Connel. "We'll know soon enough!"
Scientists estimate the present age of the earth to be about two billion years, basing their conclusions on a study of lead pockets left as a result of radioactivity in rocks. The Hindu scriptures declare that an earth such as ours is dissolved for one of two reasons: the inhabitants as a whole become either completely good or completely evil.
But amongst all the effects there is one which constitutes for the radiations taken as a whole, a veritable process for the measurement of radioactivity. This is their ionizing action on gases.
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