Phil. Trans. R. Soc. B 361, 1857–1875 (2006) (doi:10.1098/rstb.2006.1896)
The following author addresses were omitted from the above article.
6Planetary and Space Sciences Research Institute, The Open University, Milton Keynes, MK7 6AA, UK
7Space Research Institute, Austrian Academy of Sciences, Schmiedlstr. 6, A-8042 Graz, Austria
- © 2006 The Royal Society