Why Mathematicians Are Obsessed with (and Hoarding) This Chalk | Live Science
Maybe it's just me, but for an expensive chalk, you'd think pre-drilling a divot in the chalk would not be a thing. You paint the chalk on the tip, not drill it
SLP on X: "This isn't the most expensive thing in this shop. Not by a long chalk. https://t.co/bzStqGKfLl" / X