EarthCan Europe's arts festivals illuminate our crisis-ridden world? Climate change and technological dystopia were centre stage at three recent festivals in Norway and Austria, but the artworks struggled to rise to the challenge CultureLab
LifeThe Invention of Nature finds science's lost hero We find his name on mountains, lakes, towns – even a "sea" on the moon. So why is the naturalist Alexander von Humboldt largely forgotten, asks Andrea WulfCultureLab