Summary: Melvyn Bragg and his guests discuss absolute zero, the lowest conceivable temperature, about minus 273 degrees Celsius. At temperatures close to absolute zero, physicists have discovered a number of strange new phenomena including superfluids, liquids capable of climbing a vertical surface. Melvyn Bragg is joined by Simon Schaffer, Professor of the History of Science at the University of Cambridge; Stephen Blundell, Professor of Physics at the University of Oxford and Nicola Wilkin, Lecturer in Theoretical Physics at the University of Birmingham.
