another few years before we understand what happens.”

Is cannabis a “gateway” to the use of other, more harmful drugs?

Cannabis has long been seen as the first stepping stone to the use of harder drugs.

A year ago, the National Academies of Sciences, Engineering and Medicine issued a landmark report drawing on two decades of cannabis research to outline nearly 100 conclusions about the drug, including that there was limited evidence of a statistical link between marijuana use and changes in how people use other legal and illegal drugs.

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It noted that previous research had questioned why cannabis was seen as a “gateway” drug when most people drink and smoke cigarettes as teens before they consume marijuana for the first time.

The review did find that cannabis users wereRecorded audio and motion picture media has been an aspect of society since the days of Thomas Edison. At the start of the 20th century there was wide distribution of recorded audio media (cylinders and records) and motion picture media (nickelodeons and movies), but both technologies were still in their infancy. In the late 1920s motion pictures were combined with audio on a mass-market basis, followed by color motion pictures with audio. Radio broadcasting gradually evolved into a largely advertising-supported form of broadcast mass-market audio media. When a television (TV) broadcast standard was established in the mid-1940s, television joined radio as a form of broadcast mass-market media bringing previously recorded or live motion pictures into the home.
By the middle of the 20th century, a large percentage of US