One of the four main Aztec crops at the time of Columbus's arrival in the New World, chia is now a forgotten food of the Americas. Chia seed oil offers the highest omega-3 fatty acid content available from plants, but today this species is known only for its use in "chia pets." Yet pre-Columbian civilizations used chia as a raw material for medicines and nutritional compounds, while chia flour could be stored for years as a food reserve and...