I have put on the web http://www.bangor.ac.uk/~mas010/hdaweb2.htm an article with the above title. This is intended to give general readers an idea of what this subject is about, so it is non technical, and that is why it has a link from the sculpture site. We want to inform scientists and young mathematicians of what is going on, and to get discussion of these ideas. The references could be enlarged and improved, and I would welcome suggestions on this. I would welcome comments on this article before submitting it for publication. Ronnie Prof R. Brown, School of Mathematics, University of Wales, Bangor Dean St., Bangor, Gwynedd LL57 1UT, United Kingdom Tel. direct:+44 1248 382474|office: 382475 fax: **(from Monday March 17, +44 1248 383663)** World Wide Web: home page: http://www.bangor.ac.uk/~mas010/ Symbolic Sculpture and Mathematics: http://www.bangor.ac.uk/~mas007/ Mathematics and Knots: http://www.bangor.ac.uk/ma/CPM/exhibit/welcome.htm