In ancient Rome, it took 40 years of labor to make a tonne of copper. By 1800, it was down to 6 years. Today, it takes just 21 days.
+bonifartius 𒂼𒄄
In ancient Rome, it took 40 years of labor to make a tonne of copper. By 1800, it was down to 6 years. Today, it takes just 21 days.