The Inca stones were not fitted by patient pecking with hammer stones; they were fused with acid.

The common archeological wisdom that you’d find out of a textbook is that they just kept pecking away at it with hammer stones and setting them and resetting them until they were perfect, which has to be bullshit, that there is no way that they just were that meticulous. I mean, everybody’s got a hammerstone. I personally think it’s acids.