It is beyond us to divine how any people could have bred cobs of corn from such a thin and unpropitious plant--or even thought to try. Hoping to settle the matter once and for all, food scientists from around the world convened in 1969 at a conference on the origin of corn at the University of Illinois, but the debates grew so vituperative and bitter, and at times so personal, that the conference broke up in confusion and no papers from it were ever published.