Today I learned about knot theory. Knot theory is a branch of maths that studies mathematical knots. The mathematicians that invented knot theory started to map out the space of possible knots and study their properties. The basic definition for a knot is, that it’s a closed loop in a 3 dimensional space that in uniquely tangled. Meaning you can’t untangle it without breaking the loop.

I came across this when I saw this wonderful video by Steve Mould about a puzzle which only difficulty is to get it back into the package. A wonderful idea for a puzzle, even though one might argue, you can buy almost anything for that. There is also a good summary and even a University playlist on the topic.