Check out this article about a 5-axis milling rig which uses sophisticated 3-D design software to carve a helmet out of a solid block of aluminum.
Information technology meets precision robotics, and achieves something resembling kinetic poetry. Form emerges from brute matter in a gleaming spray of metal shavings, a marriage of genius and machinery which would make Michaelangelo weep (with joy? with grief?).
Don't miss the extraordinary video.
Belated H/T to Mr. Hengist who, I now recall, sent me the vid months ago.