Cannabis has been used by humans for thousands of years and is one of the most popular drugs today. With effects such as feelings of joy and relaxation, it is also legal to prescribe or take in several countries. By: Barbara Jacquelyn Sahakian, Christelle Langley, Martine Skumlien, Tianye Jia Professor of Clinical Neuropsychology, University of […] Read the full story on GreekReporter.com.