Blog

• How games fake 3D sound on headphones — Oct 15, 2026
  An interactive guide to the maths of hearing in 3D, played by the band from Outer Wilds.
• Prime knots are determined up to mirror image by the finite quotients of their groups — Oct 14, 2026
  The proof combines Xu's results on profinite isomorphisms of 3-manifold groups with the marked recognition theorem of Biswas and Singh.
• Mooring a 4D boat — Sep 27, 2026
  Knots don't hold in four dimensions.
• Mooring a 4D boat — Sep 24, 2026
  Knots don't hold in four dimensions.