We want 'I love you' to mean forever. But neuroscientists claim that by three years into a relationship romantic activity in the brain has ceased. Can we only know love in short doses? Should we accept romance as fleeting and abandon long term commitments, or can we outwit evolution and make love last?

Screw the Fairytale author Helen Croydon joins Ethicist Naomi Goulder and transhumanist Anders Sandberg to rethink romance.

From the Institute of Art and Ideas collection.