(Credit: Africa Studio/Shutterstock)

Public interest in the science of powerful psychoactive drugs is at an-all-time, er, high. Evidence for the therapeutic benefits of marijuana, MDMA, psilocybin and more is growing, based on a resurgence of scientific interest in studying these compounds.

But many of these drugs are strictly banned by the federal government, and those caught with them on the street can face steep fine and felony prison time. So where are researchers getting the drugs fo