Dr. Mahlberg obtained one of only two Drug Enforcement Administration (DEA) Schedule 1 research licenses to pursue studies on Cannabis in the United States spanning a period of 33 years from 1970-2003. During that time he accumulated one of the most extensive seed banks in the world with over 200 strains (varieties) of Cannabis from worldwide sources including landrace varieties, which were cultivated in secure greenhouses. The studies are available in over 30 scientific publications on Cannabis.
Dr. Mahlberg is a Professor Emeritus of Indiana University and was an active professor in the Botany department of the University until 1994 after which he continued his research on Cannabis and maintained his laboratory until 2003. Dr. Mahlberg received his Ph.D. in Botany from the University of California, Berkeley and his M.S. and B.S. degrees in Botany from the University of Wisconsin, Madison.