wonderful link! I went to their link on Pork and learned more about pigs in ten minutes than I had learned in my whole life!
The suggestion in that article is that humans reared animals first, and didn't get into growing crops until later. Now isn't that interesting.

Also, if Nela is reading this, there's an interesting section on Spain, who were instrumental in distributing pigs to the new world and other places, and it even mentions one of Nela's recipe photos she posted:
"Cochonillo asado, a strongly traditional Castilian meal, features a 1-month-old piglet fed only on its mother’s milk and roasted in an earthenware dish."

Now that's what I would love to try!

Michael Gardner
Australia