Most of the time I go home for lunch a bit before noon.  The History Channel usually shows Modern Marvels at Noon Central Time ( here in the U.S. ).

Yesterday, I was eating lunch when the Modern Marvels episode went into great detail on the history of fertilizer.  Let's just say that I didn't watch too much of the episode because fertilizer and lunch, in most general terms, are not compatible.  ( basically, you don't want to see where fertilizer comes from when you're eating. )

Anyway, it would seem that Peru, Chile, and Bolivia got into a war over, and I'm not making this up, bird guano.  Yep, bird poop.  Which was used for fertilizer at the time.

Several thousand people died in what became the War of the Pacific 1879-1884 and Bolivia became a land-locked country because the affair.

Amazing.