AdvertisementHow Twitter's Trending Algorithm Picks Its Topics05:05Download AudioResumeDecember 07, 2011Laura SydellfacebookEmailOccupy Wall Street protesters meditate while a sign bearing their Twitter hashtag hangs from a railing in Zuccotti Park in October. Some activists accused Twitter of censorship because #OccupyWallStreet wasn't appearing on trending lists. (Reuters/Landov)