Question: who was the swedish scientist who developed a naming system based on organisms observable traits
Answer: Carl Linnaeus ( / lɪˈniːəs , lɪˈneɪəs / ; 23 May 1707 -- 10 January 1778 ) , also known after his ennoblement as Carl von Linné ( Swedish pronunciation : ( kɑːɭ fɔn lɪˈneː ) ( listen ) ) , was a Swedish botanist , physician and zoologist , who formalised the modern system of naming organisms called binomial nomenclature .