Over the past few weeks a slow-moving weather event has led to record high temperatures across North America.This kind of event is known as a heat dome, and it’s breaking existing models that try to predict the weather. Today, Max Opray on why this particular heat even is alarming climate scientists, and what it means for the next Australian summer.

A speaking tour of Europe has revealed the strategy behind Peter Ridd’s rejection of reef science: he believes that if people doubt the reef is dying, they will doubt climate change more broadly.