A commonly taught technique to reduce the impact and intensity of cravings is to minimize your exposure to those triggers that provoke them. A recent study shows how hard this to do - showing that the brain sees things that we are not even consciously aware of, other than being conscious of wanting another hit...

Marijuana today is not what it was, and when people say they're having trouble giving it up, it may be because it's twice as strong as it was only 20 years ago.