This research would never have been possible without the dedi-cated effort of the New Horizons Team,whose persistence and intellectual leadership led to exciting discoveries of a remote world that was previously all but unknown to humans.We thank the New Horizons Team especially for making their data not only available to the public but in a format that outsiders can use directly for meaningful research.This study is a result of curiosity-driven research not funded by any agencies.Our work benefited greatly from discussions with our colleagues Dave Paige and Hilke Schlichting at UCLA. （）