In this article, http://en.wikipedia.org/wiki/Uplift_Universe, the words "Five Galaxies," which occur multiple times in the article, temporarily appeared in a serif font, looking like Garamond or Times New Roman. However, if these words were hovered over, they changed into the normal sans-serif font, which I believe is Arial. Is it possible to edit an article for this to occur, why would this be beneficial, and why would the font change when hovered over?
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