Halloween got Keith Robison thinking about other candy-laden US holidays, such as Easter, which in turn made him think about Easter Eggs, those hidden finds inserted into computer applications and games. In turn, that reminded him of little gems of scientific interest found in a paper's supplementary online material or buried in a footnote. One such item Robison liked was a footnote to a multiplex sequencing paper by George Church that said the technology was being used to shotgun sequence Salmonella typhi and Escherichia coli.