Editor's note: Humans didn’t originally eat grains because we’re not able to digest them in raw form. But fire changed all that! Now we have a world of grains to choose from, and they can come in fattening (but delicious) forms like croissants, in healthy versions like quinoa (get your amino acids!) and in everyday versions like rice, a staple of many cuisines. Celebrate grains (and fire) in this beautiful collection and get some lovely Grains wallpapers for your screens.