Flash! Smoking dope makes you stupid.

Scientists make a career out of explicating the obvious

Teenagers respond differently to drugs than adults, and early use may lead to long-lasting effects on brain development, according to new research.
A study presented at the Society for Neuroscience meeting, in San Diego last week, shows people who start using marijuana at a young age have more cognitive shortfalls. Also, the more marijuana a person used in adolescence, the more trouble they had with focus and attention.

Wow! Am I ever surprised!