Science, Том 54John Michels (Journalist) American Association for the Advancement of Science, 1922 Since Jan. 1901 the official proceedings and most of the papers of the American Association for the Advancement of Science have been included in Science. |
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... means that these " eternal " elements - this radium and this uranium which we have here are not eternal at all . The average life of the atoms of this radium is just 2,500 years , and after that time the aver- age atom will have ...
... means that these " eternal " elements - this radium and this uranium which we have here are not eternal at all . The average life of the atoms of this radium is just 2,500 years , and after that time the aver- age atom will have ...
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... mean ? It means that the life history of our planet is perhaps not at all what we have heretofore thought that it was . It means that a planet that seems to be dead , as this our earth seems to be , may , a few eons hence , be a ...
... mean ? It means that the life history of our planet is perhaps not at all what we have heretofore thought that it was . It means that a planet that seems to be dead , as this our earth seems to be , may , a few eons hence , be a ...
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... means ; we do not see it in its relation to other centuries . And therefore I should like to take you up in an Einstein airplane that violates all the re- lations of space and time so that you may see with me a few spots in geography ...
... means ; we do not see it in its relation to other centuries . And therefore I should like to take you up in an Einstein airplane that violates all the re- lations of space and time so that you may see with me a few spots in geography ...
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... means at our control , to disinte- grate atoms . And we have already found that we can do it , and radium has helped us to make that discovery . But we have only begun on this type of work . Its possibilities are untold . From my point ...
... means at our control , to disinte- grate atoms . And we have already found that we can do it , and radium has helped us to make that discovery . But we have only begun on this type of work . Its possibilities are untold . From my point ...
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... means " gnawing away , " and is properly used to include all natural processes which have their origin at the earth's surface and which involve the destruction of rocks at or near the earth's surface . This is the broadest term ...
... means " gnawing away , " and is properly used to include all natural processes which have their origin at the earth's surface and which involve the destruction of rocks at or near the earth's surface . This is the broadest term ...
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