Scientists have created a 2-nanometer-high Solomon’s knot out of zinc and copper, just because they felt like it and they could. 8)
http://blogs.zdnet.com/emergingtech/?p=461
Lois Rose Rose (sic! 8) has written a book about the seeming universality of the images of the Solomon’s knot in history and from various cultures http://stoneandscott.com/solomonsknot.asp