Woman walks snootily away from Man, who is holding out a bunch of flowers and saying, 'I bought you these solar-powered devices for carbon dioxide extraction.'
- cartoon in this week's New Scientist. Hat-tip: Grains of Sand.
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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