'(<a href="http://www.j-archive.com/media/2009-01-01_DJ_30.jpg" target="_blank">Jimmy reports from the Scripps Institution of Oceanography.</a>) To track global warming, scientists use Antarctic ice cores & measure relative amounts of different forms of elements known as these'
isotopes
AN ELEMENT-AL CATEGORY: To track global warming, scientists use Antarctic ice cores & measure relative amounts of different forms of elements known as these
To track global warming, scientists use Antarctic ice cores & measure relative amounts of different forms of elements known as these
To track global warming, scientists use Antarctic ice cores & measure relative amounts of different forms of elements known as these
AN ELEMENT-AL CATEGORY
isotopes
AN ELEMENT-AL CATEGORY