There is a growing number of people who regard marijuana (cannabis) as a benign medicine, offering relief to people suffering from a variety of illnesses, including epilepsy, arthritis, multiple sclerosis and glaucoma as well as lessening the side effects of medications and treatments given to cancer and HIV patients. CBC Television's THE NATURE OF THINGS with David Suzuki examines the medicinal uses of marijuana.

It is only recently that humans have become aware that animal communication is often elegant, elaborate and subtle. Understanding how other species communicate tells us a great deal about the history and evolution of our species.