▁to ▁" all ▁complex ▁nerv ous ▁systems " ▁and ▁he ▁"[ inv estig ated ] ▁the ▁general ▁principles ▁of ▁nature " ▁( Aut rum ▁ 1 9 9 4 ). ▁ ▁Life ▁and ▁death ▁Heil igen berg ▁was ▁born ▁in ▁Berlin , ▁Germany , ▁but ▁moved ▁to ▁Mün ster ▁soon ▁afterwards . ▁ ▁He ▁then ▁spent ▁part ▁of ▁his ▁early ▁ad ul th ood ▁in ▁Mun ich ▁and ▁Se ew iesen ▁before ▁ultimately ▁moving ▁to ▁San ▁Diego , ▁California , ▁in ▁ 1 9 7 2 . ▁Heil igen berg ▁was ▁killed ▁in ▁the ▁crash ▁of ▁USA ir ▁Fl ight ▁ 4 2 7 ▁on ▁September ▁ 8 , ▁ 1 9 9 4 , ▁while ▁on ▁his ▁way ▁to ▁deliver ▁a ▁lecture ▁at ▁the ▁University ▁of ▁Pitts burgh ▁( L ead ers ▁in ▁Their ▁Field s ▁ 1 9 9 4 ). ▁ ▁Scient ific ▁background ▁and ▁work ▁Heil igen berg ' s ▁interest ▁in ▁eth ology ▁started ▁at ▁a ▁young ▁age , ▁when ▁he ▁met ▁Kon rad ▁Lor enz , ▁one ▁of ▁the ▁found ers ▁of ▁modern ▁eth ology ▁and ▁head ▁of ▁a ▁Max ▁Plan ck ▁research ▁group , ▁in ▁ 1 9 5 3 ▁( Z up ance ▁and ▁Bul lock ▁ 2 0 0 6 ). ▁ ▁Through ▁Lor enz ' s ▁influence , ▁his ▁interest ▁in ▁fish ▁and ▁animal ▁behavior ▁th riv ed ▁even ▁before ▁entering ▁college ▁( Aut rum ▁ 1 9 9 4 ). ▁ ▁He ▁initially ▁entered ▁the ▁University ▁of ▁Mün ster ▁in ▁ 1