It’s 420 or “weed day,” and people around the world will be paying homage to their favorite guilty pleasure: marijuana. Currently, 24 states, two territories and the District of Columbia in the United States have legalized marijuana for recreational use, making it that much easier for people to take a toke or pop an edible at 4:20 p.m. on April 20 (if not all day). But not everyone joins in on the 420 festivities. Some scientists who study weed have become increasingly concerned about the... Read this story
