Here is a very informative and interesting video about Raphael Mechoulam, the scientist who discovered THC and the human endocannabinoid system. I found it interesting that the NIH in the United States supported him financially for years.
He has been awarded numerous high ranking international awards. Yet his studies are not to be found in the U.S. where the Federal government does not believe that cannabis has any medicinal value.
This is a video you need to watch.