According to Encyclopedia Britannica, bronze, is a mixture of two metals: copper and tin. By mixing these two metals, the copper is strengthen and thus making bronze a harder metal.
It is also harder than pure iron and far more resistant to corroding. Bronze is also more easily melted or fusible and hence easier to cast. Because bronze has been made and used before 3000 BC, archeologists find it interesting to research because artifacts tend place its common usage at a much later date.
Click on an image to find out more