Social media has changed the way we connect with those around us. But simultaneously, social media could also divide us. This possibility is known as social media polarisation. The idea that people become more extreme in their policy attitudes or political preferences because they are surrounded by like-minded views. Researchers from Meta, the parent company of Facebook and independent US researchers have teamed up to try to provide some solid evidence. They looked at how prevalent echo chambers are on the social media platform Facebook. Most people see most of their content from like-minded sources. But a much smaller proportion of users get the vast majority of theircontent from like- minded sources. And this result gives a sense of the information we