Just before the vote, a video with homophobic overtones appeared across multiple social media networks and may have helped steer the election toward far-right president-elect Jair Bolsonaro.
A new website lets people play the role of propagandist, giving them a more sophisticated idea of how and why fictitious news is created.
Misinformation is hard to dislodge, but certain techniques can help.
New research suggests it's harder to dislodge vague implications than overtly stated errors.
It may seem reasonable for on-air talent to fill airtime with speculation and predictions, but it’s more difficult for us to correct that sort of misinformation later on.