Playwright David Edgar weighs the dramatic impact of a new character, Joe the Plumber, in the third presidential debate. (Also, Steve Coll on this post-modern fable.)
Ancient Peruvian civilisation grew mighty by harvesting guano
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The Chincha Kingdom was transporting seabird excrement from islands to
valleys as early as the 13th century, and this powerful fertiliser may have
been key...
5 hours ago



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