It's pretty well known that cannabis has a long history of human use. What we didn't know was just how far back the connection between man and maal goes.
According to the study published in Science Advances, the residue had chemical signatures that indicated high levels of tetrahydrocannabinol (THC), the psychoactive compound in marijuana.
Mark Merlin, a professor of botany at the University of Hawaii, said,
The fact that psychoactive ancient residue has been documented in laboratory testing is the key new finding.
He proposed that it was used to facilitate the body's communication with the afterlife (and probably have a pretty nice time while doing it).
The higher THC levels suggest that people might have been actively cultivating stronger cannabis specimens. And then they were sitting in mountains, getting high, and talking to spirits. It was basically Kasol.