In the latest episode of On the Marie Curie Couch, neuroscientist Professor Sophie Scott sits down with bereavement expert Jason Davidson.

This month, Jason is joined by neuroscientist Professor Sophie Scott. Her research looks at voices, speech and laughter – particularly speech perception, speech production, vocal emotions and human communication. Sophie's TedTalk, Why We Laugh, has had more than 4.5 million views.

In this episode of the podcast, she talks to Jason about the death of her dad, Colin, who Sophie describes as having been a 'proper optimist'.