On this Christmas episode, our theoretical physicist guest is Geoffrey West, Professor and former President of the Sante Fe Institute. We discuss his recent groundbreaking work in the world of biological and social complexity. In the last few years, the Professor has applied his high-energy atom smashing physics know-how, to the field of biology and came up with some startlingly general results, which give us deep insights into all sorts of things, from the life-expectancy of a mouse and the efficiency of cities, to the very nature of our social systems, and their limits.

Astounding stuff.... Enjoy!

PS The show is now on twitter.... the follow button is just over there on the left hand side of the web page.

PPS A very merry Christmas to all you listeners.