The story made headlines around the world - that chocolate can help with weightloss...
The stories cited a study by The Institute of Diet and Health, involving German dieters.
The problem was - the institute doesn't exist, and only 15 dieters were studied, making the results statistically insignificant.
It was all part of an elaborate ruse by journalist and scientist John Bahannon to prove how quickly and easily misinformation can spread - and to encourage the media to be more responsible when it comes to covering science and health stories. He talks to Kathryn Ryan.