Zircon remnants trace planetary evolution

A Canadian-led international team of scientists has used 3-billion-year-old zircon microcrystals to trace North America's planetary evolution.

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<p><a href="http://www.physorg.com/news125065678.html">Zircon remnants trace planetary evolution</a></p> <p>A Canadian-led international team of scientists has used 3-billion-year-old zircon microcrystals to trace North America's planetary evolution. </p>