(Anglo-Saxon, iron; L. ferrum) Iron was used prehistorically:
Iron is a relatively abundant element in the universe. It is found in the sun and manytypes of stars in considerable quantity. Its nuclei are very stable. Iron is a principalcomponent of a meteorite class known as siderites and is a minor constituent of theother two meteorite classes. The core of the earth -- 2150 miles in radius -- is thoughtto be largely composed of iron with about 10 percent occluded hydrogen. The metal is thefourth most abundant element, by weight that makes up the crust of the earth.
The most common ore is hematite, which is frequently seen as black sands along beachesand banks of streams.
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'The strength and weakness of physicists is that we believe in what we can measure. And if we can't measure it, then we say it probably doesn't exist. And that closes us off to an enormous amount of phenomena that we may not be able to measure because they only happened once. For example, the Big Bang. ... That's one reason why they scoffed at higher dimensions for so many years. Now we realize that there's no alternative... '