Stone Age. Bronze Age. Iron Age. We define entire epics of humanity by the technology they use.
In the fifties I had dreams about touching a naked woman and she would turn to bronze or the dream about hot dogs chasing donuts through the Lincoln Tunnel.
My dad was dean of fine arts at the university. I was casting bronzes in the school foundry. I was using the university as a playground.
The American public is not aware that there might be potential allergenic and toxic reactions. With regular food at least people know which foods they have an allergy to.