Scientists seek marijuana's isotopic fingerprint

Scientists at the Alaska Stable Isotope Facility can tell whether marijuana confiscated in a traffic stop in Fairbanks likely came from Mexico or the Matanuska Valley. They're also working on a way to determine whether it was grown indoors or out.

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<p><a href="http://www.physorg.com/news101728230.html">Scientists seek marijuana's isotopic fingerprint</a></p> <p>Scientists at the Alaska Stable Isotope Facility can tell whether marijuana confiscated in a traffic stop in Fairbanks likely came from Mexico or the Matanuska Valley. They're also working on a way to determine whether it was grown indoors or out.</p>