When the astronomer Donald Menzel sat on committees he would keep in front of him on the table a set of colored pens, with which he drew fanciful pictures of “Martians” when the talk failed to engage him. His description of this one reads, “Frustration. This animal-bird…may have derived some of its feeling of frustration from the committee meeting during which I made the sketch.” From Donald H. Menzel, “An Earthling’s view. Meet the Martians,” The Graduate Journal 7, No. 1 (December 1965): 220-233—one of the more unusual treasures of the Niels Bohr Library. Credit: The Royal Society 2004, courtesy of the Niels Bohrs Library and Archives.