From Max Miller's informative & entertaining YouTube channel Tasting History comes this lesson on pemmican, a mixture of meat and fat/tallow that was invented by the indigenous peoples of North America. Pemmican's main attributes are its shelf-life (years), portability, and nutritional value, making it an ideal "power bar" to be taken on expeditions or long ship voyages.
See also Miller's videos on hardtack. (via open culture)