In topology, a branch of mathematics, the trefoil knot is the simplest example of a nontrivial knot:

This is Kevin Hutson’s design, well CP really, that I sort of just nutted out after mis-folding it 4 times and uttering some bad words (sorry Mum). The observant amongst you will notice that it starts and finishes at the same point – like a mobiius strip on acid. Continue reading →