Scientists have done it again. They've spent good time and money to figure out something we already know – that pot-smokers are slackers.

This completely unsurprising fact is the conclusion of a group of researchers who spent time studying a group of marijuana users. What they found is that smoking weed over time lowers dopamine levels in the brain, resulting in a lack of motivation. And get this – the subjects also experienced strange thoughts, paranoia and a craving for Doritos. OK, we added in the part about Doritos.