PORTLAND, Ore. — You might have thought that scientists had already cataloged the 118 natural elements–from hydrogen to silicon to uranium–and their various isotopes. Unfortunately, only the first ...
Actinium-225 is an alpha emitter, spewing out tiny bundles of energy that promise to kill cancer cells, but only at short range. This isotope and others like it are the focus of a ...
Sixty years ago, the very first samples of rainwater were collected for the Global Network of Isotopes in Precipitation (GNIP), while the science of isotope hydrology was still taking its first steps.
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