People-powered cities and finding yourself in the family history books

Pushing for change takes a sustained effort — it requires people to keep showing up, keep organising, and keep working together. And building a movement often means finding common ground with people outside your usual circles. Amanda Tattersall and Kurt Iveson, co-authors of People Power in Cities, explore what it takes to create real change. Around 26 million people worldwide have taken an at-home DNA test to discover their ancestry. For Simon Chate, it led him to a family he never knew existed. So what's behind this yearning to connect with our past? And what does it teach us about ourselves? Trust in medical institutions is declining, and it's never been easier to find alternative information online. So how do you support someone you love who's started exploring questionable treatments?