1) Weighing the dangers of cannabis (Emily Sohn, Nature, 8-28-19) Excerpts: Clement and her colleagues analysed the findings of 68 reviews of cannabis research. Of the reviews, 62 showed associations between the drug and various adverse outcomes, including impaired driving, increased risk of stroke and testicular cancer, brain changes that could affect learning and memory, and a particularly consistent link between cannabis use and mental illnesses involving psychosis. Risks were highest for teenagers, pregnant women and people already at risk of mental... Read more