Large image view: Tracing marijuana to its roots
![[Photo: Read caption below]](/news/archives/news-archives-2002-2010/featured/07/marijuana/images/zoom/lab.jpg)
ÃÛÌÒÓ°Ïñ photo by Marmian Grimes
Tim Howe and Matthew Wooller stand in the laboratory at the ÃÛÌÒÓ°Ïñ Stable Isotope Facility.
Large image view: Tracing marijuana to its roots
ÃÛÌÒÓ°Ïñ photo by Marmian Grimes
Tim Howe and Matthew Wooller stand in the laboratory at the ÃÛÌÒÓ°Ïñ Stable Isotope Facility.