Impact craters on Pluto and Charon indicate a deficit of small Kuiper belt objects. - Singer KN; McKinnon WB; Gladman B; Greenstreet S; Bierhaus EB; Stern SA; Parker AH; Robbins SJ; Schenk PM; Grundy WM; Bray VJ; Beyer RA; et al. (Science (New York, N.Y.), 2019)