As demand for ADHD medication skyrockets, Guyon Espiner asks leading psychiatrist Dr Sam McBride why more people than ever before are being diagnosed with the condition - and to what degree unregulated online testing and Big Pharma are playing in the surge.

Extreme storms and unbelievable heat. Climate science pioneer, Michael Oppenheimer, tells Guyon how weather events will change as the atmosphere heats up - and what we need to do to prepare ourselves. Plus, he tells us what he thinks about soup-throwing climate activists.