The twitter stream down the right-hand side of this blog is usually self-explanatory. But today's three tweets that list a series of names are followed by #FF. This stands for 'Follow Friday', where twitterers pass on recommendations at the end of the week.
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...
4 hours ago
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