In 1933, on his second expedition to Antarctica, Richard E. Byrd took the unusual, highly-publicized step of bringing some non-human crew along: Klondike Gay Nira, Deerfoot Guernsey Maid and Foremost Southern Girl. These three cows--four, if you count the one born in the course of the journey--were darlings of the US press both during and after the journey. But why did Byrd bring them to Antarctica in the first place?