popcorn

The first ones to have used popcorn or small kernels of corn that burst when exposed to heat in their diets were American Indians. Later this "disease" spread throughout America and came to Europe. Since 1912 popcorn is sold in cinemas and is now an integral part of it. Given the fact that popcorn is a grain, similar to breakfast cereal, it could be a nutritional component of a sustained diet if it wasn`t salted or artificially sweetened.