jueves, 8 de diciembre de 2011

Meet the Obscure Useful Metals Lurking in Products All Around You

Without the rare earths, there would be no iPods and no hybrid cars.

But who has even heard of erbium or ytterbium?

Source:
http://discovermagazine.com/2011/jul-aug/12-meet-obscure-metals-that-lurk-products-all-around-you