Cannabis still has mystery, Canada’s first weed-only academic researcher says BY THE A cannabis plant approaching maturity is photographed at the CannTrust Niagara Greenhouse Facility during the grand opening event in Fenwick, Ont., on June 26, 2018. THE CANADIAN PRESS/Tijana Martin – Dankr.ca

Cannabis still has mystery, Canada's first weed-only academic researcher says BY THE CANADIAN PRESS A cannabis plant approaching maturity is photographed at the CannTrust Niagara Greenhouse Facility during the grand opening event in Fenwick, Ont., on June 26, 2018. THE/Tijana Martin

Cannabis still has mystery, Canada’s first weed-only academic researcher says BY THE A cannabis plant approaching maturity is photographed at the CannTrust Niagara Greenhouse Facility during the grand opening event in Fenwick, Ont., on June 26, 2018. THE CANADIAN PRESS/Tijana Martin