marijuana joint being rolled*Scientists and researchers are baffled when it comes to the active chemical in marijuana called THC.

The drug has long been illegal because the specific effects that the chemical has on the human body are still a mystery.

Recently, only some elements have been detected and researched to learn more and more about the unpredictable risks associated with the drug.

A team of researchers at the University of Southern California interviewed more than 350 men, 163 of whom had been diagnosed with testicular cancer, about recreational drug use including: poppers, mushrooms, Quaaludes, PCP, barbiturates and speed.