After the election, many people blamed Facebook for spreading partisan — and largely pro-Trump — “fake news,” like Pope Francis’s endorsement of Trump, or Hillary Clinton’s secret life-threatening illness. The company was assailed for prioritizing user “engagement,” meaning that its algorithms probably favored juicy fake news over other kinds of stories. Those algorithms had taken ...

Agatha Christie’s murder mystery The Mousetrap is the longest running play in history. Its first run began in 1952, and it hasn’t stopped since. Another perennial whodunnit — “Who Murdered Political Science” — is mounting a strong challenge for the runner up. Regularly repeated performances haven’t stopped audiences from enjoying the traditional denouement, in which ...