One summer as I typed on my laptop at the kitchen table, I had two very persistent visitors buzzing around my face. Try as I might, I couldn’t chase them away, and eventually it occurred to me that they might be trying to help. I read that the common house fly, or musca domestica, is purely attached to humans and follows them around. Wherever human beings live on earth, there musca domestica makes its home, and I began to wonder why, since we aren’t very grateful. Then I thought about the human obsession with flight, and my story began.