Long before sunflower seeds became a popular snack food, they were a foodstuff valued by Native Americans. For some 10,000 years, from the end of the Pleistocene to the 1800s, the indigenous peoples of the plains regarded edible native plants, like the sunflower, as an important source of food. Not only did plants provide sustenance during times of scarcity, but they also added variety to what otherwise would have been a monotonous diet of game. Nevertheless,...