Nature obituary GN_Ramachandran_1922-2001 P_Berg_1926-2023 DA_Evans_1941-2022 R_Grubbs-1942-2021 RR_Ernst_1933-2021 E_Negishi_1935-2021 LP_Yuan_1930-2021 P_Crutzen_1933-2021 GA_Olah_1927-2017 RH_Coase_1910-2013 N_Armstrong_1930-2012 F_Sanger_1918-2013 RY_Tsien_1952-2016 R_Heck_1931-2015 AH_Zewail_1946-2016 ML_Minsky_1927-2016