Photo of the Day
A memorial in Dublin for the victims of the potato famine
Famine Memorial, Dublin
This Month in Photo of the Day: National Geographic Magazine Features
Relying on a small number of food crops is risky, as Irish farmers discovered when the Lumper potato succumbed to blight, resulting in the great Irish potato famine that began in 1845 (memorialized in Dublin above).
See more pictures from the July 2011 feature story "Food Ark."