Is Facebook to blame for making us more polarized? No, we are. (+video)

Critics have worried that the algorithm Facebook uses to determine what users see could be creating 'bubbles' that allow us to see only what we agree with. A new study finds that users are driving the trend more than Facebook itself.

A quick Google search for the social-media giant Facebook turns up a range of provocative questions: Is Facebook making us lonely? Is Facebook losing its cool? Is Facebook dying?

Scientists at Facebook have added another: Is Facebook reinforcing ideological bubbles that users build around themselves?

Their short answer is:...