We always see scientific studies floating around the internet or on the TV, and often they're quite shocking - things like "chocolate can help with pregnancy", "tomatoes can prevent Alzheimer's", or "smelling farts can cure cancer".
A lot of the time they seem too good to be true but we might be more likely to believe them because we're told there's science behind them.
But 'Last Week Tonight' host John Oliver wants us to look deeper and realise that it's not all it seems to be, and the current state of science is actually contributing to some fairly dangerous ideas.