This week, like so many other weeks, it's been easy to take a look at the world and think: how did things get so polarised? Ahead of the European elections, the battle lines are already being drawn: nationalists vs globalists, liberals vs conservatives. But a fascinating project is trying to get Europeans from across the political spectrum to actually sit down and talk about their differences. Sebastian Horn, the deputy editor of Die Zeit online, is on the line from Berlin to explain the thinking behind the Europe Talks project. Plus: changing populist fortunes from Budapest to Amsterdam, and the mathematics of soap bubbles.