Originally posted by Alrekr Ironhand:

And then there's smelting 24lb of copper and 12lb of tin together to yield 12lb of bronze. (Do you EVEN MATH, bro?)

Copper density: 8.96 g/cm3
Tin density: 7.265 g/cm3
Bronze density: 7.7 - 8.7 g/cm3

They might not do math, but they certainly do physics.