Also take a note of the last names of these US representatives (comprehensive lists for both subjects): IMO 2017: Lin, Gu, Bhattacharya, Chroman, Peng, Huang

Also take a note of the last names of these US representatives (comprehensive lists for both subjects): IMO 2017: Lin, Gu, Bhattacharya, Chroman, Peng, Huang IPhO 2017: Song, Raman, Balaji, Qin, Shi I would guess that, for many if not most of them, their ancestors just immigrated to the US 1-2 generations ago.