Facebook launches a series of global News Feed ranking tests to solicit user feedback on posts they're seeing and what posts users find valuable (Sarah Perez/TechCrunch)

Sarah Perez / TechCrunch:
Facebook launches a series of global News Feed ranking tests to solicit user feedback on posts they're seeing and what posts users find valuable  —  Facebook may be reconfiguring its News Feed algorithms.  After being grilled by lawmakers about the role that Facebook played in the attack …