T4: Why do trees live so long?

A talk to go with Episode 4, when Pan sees her first ever tree. Forest canopy cameraman and expert tree-climber James Aldred explains how trees can stay alive for centuries. Produced by Eliza Lomas and Becky Ripley. Don’t forget to take part in our Forest 404 Experiment to see how you respond to natural sounds at: bbc.co.uk/forest #Forest404