Marine biologist Professor Ove Hoegh-Guldberg "almost fell off the chair" when he realised how vulnerable the world's coral reefs would be to climate change. But after being attacked as an "alarmist", it turns out he may have been too conservative.
In this “red hot” episode, climate scientists Dr Sarah Perkins-Kirkpatrick and Dr Andrew King tells us how a half a degree centigrade of global average warming can have serious impacts on heatwaves and extreme heat.
Climate science is evolving to the point where it doesn't quite fit into the old understanding of what science actually does. Dr Sophie Lewis has written a book - A Changing Climate for Science - explaining the role of a scientist in a world where they are under increasing attack. And she explains why she has a loony bin.
Why are scientists watching a cold blob in the North Atlantic, are we making the jet stream wobblier, and why are scientists planning to march on the streets? Climate scientist Professor Stefan Rahmstorf ties all these threads together and reveals why his favourite publication was one he wrote for kids.