In case anyone missed it as I did until tipped off, Francis Crick, one of the three discoverers of DNA, has died at the age of 88. There is an obituary at <http://news.bbc.co.uk/2/hi/science/nature/2551009.stm>http://news.bbc.co.uk/2/hi/science/nature/2551009.stm Dion Giles