Changes
Iron
,'''Iron''' is a metal. It can be dug up straight out of the ground and used without much trouble. This allowed early man to discover it early, during the [[Iron Age]] in fact.Iron weapons wree were far better than ones made of softer metals, like [[bronze]]. A [[sword|swordsman]] with an iron sword could cut a bronze sword in half if his enemy tried to block him with it.
Iron was also used in [[construction]]. The [[Eiffel Tower]] and [[Golden Gate Bridge]] are both made of iron. The strength of iron meant that [[engineers]] could build much bigger structures with it than with stone.
When iron [[corrosion|corrodes]] it is called [[rust]]. Corrosion on other metals is not called rust.
Iron is also a component of red blood cells in the form of hemoglobin.
