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What amount of biodiversity in our cities is enough to benefit our wellbeing? Good evidence can be hard to come by. Andrea Mechelli, professor of Early Intervention in Mental Health at Kings College London, together with landscape architect Joanna Gibbons discuss their pioneering Urban Mind citizen science project which adopts a smartphone app to work out how much trees, birdsong and access to water have a significant effect on an individual鈥檚 mood.

How does kindness breed kindness? Daniel Martins reveals his new research into the so called 'cuddle hormone' oxytocin which helps to uncover the biological mechanism into how well our brains learn the impact of a task when we鈥檙e doing it to benefit someone else.

Are crowd stampedes to a false alarm a genuine overreaction? Claudia hears from Dermot Barr whose team have been analysing the dynamics of crowd flights from around the world in the hope of preventing them from happening.

Claudia鈥檚 guest is Professor Catherine Loveday from University of Westminster.

Made in partnership with the Open University

Producer: Adrian Washbourne