Previously, the only legal supplier of weed for scientific study was the University of Mississippi. Over 350 researchers are registered to legally examine marijuana effects, but only eight get shipments from the academic institution each year. Now, organizations can apply to the DEA to become a registered grower, which the government agency hopes will lead to more FDA-approved research on the drug's treatment potential. Coupled with the agency's rejection of two petitions to legalize weed, it's clear they want to heavily monitor every step from growth to lab.