Earlier this year, I gave a talk about D'Arcy Thompson as part of a Royal Institution lecture series on polymaths.
I notice belatedly that the Royal College of Surgeons (where the talk took place, cos the RI is being lotterified) has put audio of the talk online.
I think that link should take you straight to the sounds. If not, go here, where you can also hear Andrew Robinson talking about Thomas Young and him, me and Oliver Morton talking about poymathy in general, and whither it. Plus lots of other stuff.