Stage: 2, 3 and 4 Challenge Level: 
Watch the film below to find out about the mathematical idea of a knot.
This text is usually replaced by the Flash movie.
Real world. Discussion. Mathematical modelling. Maths in STEM. physics. engineering. Calculus generally. biology. Individual. Population Dynamics.
Published November 2007,December 2007.
Copyright © 2007. University of Cambridge. All rights reserved.
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email: nrich@damtp.cam.ac.uk