Last year it was New Horizons at Pluto. In 2016, the thrilling end of the Rosetta comet mission generated the greatest public interest and enthusiasm. Mat Kaplan talks with Matt Taylor, the Rosetta Project Scientist, just two weeks after the spacecraft touched down on 67/P. Emily says there’s reason for hope and joy after the Schiaparelli crash on Mars. Bill Nye is counting down to the US election. Mat Kaplan and Bruce Betts offer a slightly tardy Halloween edition of What’s Up.