Brian Josephson discusses an ‘Overview of Uncharted Science and Sub-molecular Dilutions’ during the ‘New Horizons in Water Science – Evidence for Homeopathy’ at 1 Wimpole Street, home of the Royal Society of Medicine in London. Prof. Josephson is emeritus professor of physics at the University of Cambridge, a Fellow of Trinity College, Cambridge, and a Fellow of the Royal Society. In 1973 he was awarded the Nobel Prize for work he carried out as a research student on tunnelling supercurrents. Since then he has become interested in the problem of incorporating the mind into physics. Josephson has also argued in support of a number of topics commonly dismissed by scientists, including cold fusion, intelligent design and memory of water. In regard to the latter he comments: ’the idea that water can have a memory can be readily dismissed on the basis of any of a number of easily understood invalid arguments’.