
Not knot
26 November 2008
Richard Elwes writes, "But what is it exactly about the conjurer's knot that means it can be pulled apart just like that, but the shoelace cannot?"...

26 November 2008
Richard Elwes writes, "But what is it exactly about the conjurer's knot that means it can be pulled apart just like that, but the shoelace cannot?"...

15 October 2008
For over 100 years, mathematicians have been grappling with the intricacies of knots – but recent discoveries could help us unravel the nature of reality

18 July 2007
Unearthing the secrets of the transcendental number known as e might answer some of the hardest questions about the physical universe