<< formalised scientifically in the Gaia Hypothesis. >> As eloquent an example of an oxymoron as one could ask for. 8-) Roger - - - - - - - - - - - - - - Roger Whitehead, 14 Amy Road, Oxted, Surrey RH8 0PX, England Tel: +44 (0)1883 713074; Fax: +44 (0)1883 716793 .