Callum Francis is back and he's higher than ever. As always High On The Air brings you the best in marijuana history, cultivation, and technology. Callum tries out the new Vaporonic vaporizer and checks in with cultivation editor Nico Escondido for tips on Spring growing. Plus a trip through space with Captain Cannabinoid, and look back at marijuana through history. So check out High On The Air to take you buzz to the next level!