Troubling news for young stoners


The “stoner” stereotype isn’t just a myth. Heavy use of marijuana in the teenage years dulls intelligence—and the loss of IQ points may last for life, according to a new study. Researchers tested the IQs of more than 1,000 New Zealand schoolchildren at age 13, before most had tried marijuana, and again at age 38. In between, they regularly surveyed […]

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