An anonymous reader writes: Frequent marijuana use before the age of 18 may cause irreversible harm to a person's intelligence, attention and memory, scientists claim. Middle-aged people who had started using marijuana in their teens showed an average decline in IQ by about 8 points and quitting pot did not appear to reverse the loss either, according to researchers at Duke University.
DEAL: For $25 - Add A Second Phone Number To Your Smartphone for life! Use promo code SLASHDOT25. Also, Slashdot's Facebook page has a chat bot now. Message it for stories and more. Check out the new SourceForge HTML5 internet speed test! ×