Jordan and Pizza
Pascual Jordan's contribution is entitled The Expanding Earth. He explains that, having been deeply impressed with Dirac's 1937 idea of a varying G/c^2, he spent time investigating the possibility that the Earth had been expanding over time. The lecture includes some beautiful geological diagrams regarding mid-ocean drift, and he talks about the difficulty that Wegener had with geologists accepting the theory of continental drift. Now we understand that the value of G/c^2 is decreasing as we go back in time, and consequences of this should indeed be measurable on Earth. Jordan says:
There exists a great diversity between the mentalities of physicist's and of geologists. Physicist's are eager to learn about new facts and new ideas caused by new facts.
Pascual Jordan is one of the founders of Jordan algebras, which appear in M theory.
For anyone who happens to be around Sydney next week: come to the Feynman fest at the University of Macquarie at 5.30 pm on Wednesday Oct 25 for free pizza!