Add wild species for modern food

[guillaume-alvarez]

Following reading of Guns, Germs and Steel by Jared Diamonds, it would be interesting to discover the wild varieties for modern corn, wheat, etc. They would be pre-requisite for their domesticated counterpart, the modern version being also much more potent in terms of growth.

It would be a good occasion to also add all the other cereals and pulses mentioned in the book as staples of some civilizations food production.