Isfahan's Ancient Pigeon Towers were fabulously intricate works of architecture meticulously designed for the manufacture of pigeon guano. [more inside]
posted by BuddhaInABucket on Aug 24, 2008 - 20 comments

1200 kilometers southwest of Acapulco lies the only atoll in the eastern Pacific: one of France's most isolated overseas possessions. First named for an English pirate/buccaneer/privateer, written about here by one John Harris in 1744, the island has changed hands numerous times: claimed by France as part of Tahiti, claimed by the US under the Guano Islands Act of 1856. The island remained uninhabited until 1906, when a British and Mexican mission began mining guano (still in demand today, though sources can now be found a little closer to home). The atoll was thought to have been polished off entirely by an earthquake rumored to have sunk the islands outright in August of 1909. [more inside]
posted by mdonley on Jun 23, 2008 - 11 comments

Long revered for its value as a fertilizer, and as a raw material for explosives, guano is the dried droppings of various birds and bats. The New York Times has published an excellent account of the Peruvian harvest of this valuable resource including a multimedia slideshow. Guano was superseded by synthetics in the early part of the 20th century, due to the development of the Haber Bosch process, which fixed atmospheric nitrogen. An attempt to harvest bat guano from a Grand Canyon cave in the late 1950’s was beset by technical problems and was ultimately unsuccessful. The remaining structures at the canyon rim are now a tourist attraction.
posted by Tube on Jun 7, 2008 - 13 comments