💡 Things I looked up today. Obsidian. Conchoidal fracture… apparently there are names to the many ways that minerals can fracture. Materials science (is always fascinating): malleability, toughness, ductility, brittleness, plasticity, shock. Why crazing happens. Water hammers, hydraulic rams.  Heron’s fountain, invented in the first century AD.  The physics behind water rockets.

Now, how to incorporate these ideas into a fantasy magic system…