If you look at the periodic table, you’ll see four elements that have rather similar names: Yttrium (Y), Erbium (Er), Terbium (Tb), and Ytterbium (Yb). This is not just a coincidence; all four of these elements were discovered in a mine in a place called Ytterby. Pronounced itter-bee, this Swedish village is found on an …
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Green Humanist 