Kamen succeeded in preparing C-14 in sufficient amounts to determine its beta-emission energy and lifetime.
Remarkably, its extraordinarily long half-life (5,700 years) differed from theoretical expectation.
Kamen became Professor of Biochemistry at Brandeis University (1957-61) and Professor of Chemistry at the University of California at San Diego (1961-1978). degrees in Chemistry and Physical Chemistry, respectively, from the University of Chicago. Kamen published over 300 scientific papers, which demonstrates the range and significance of his work. Martin Kamen died August 31, 2002 at the age of 89.
From 1967-1970, he spent every six months as Director of Research at the Centre National de la Recherche Scientifique Laboratorle de Photosyntheses in Gif-Sur-Yvette, France. His textbook on tracer methods, (1985), which focuses on his life from 1937 to 1957.
Paintings within this cave are all carbon dated, and fully intact paintings from within the shelter include paintings of fish, wallabies, crocodiles, the Barramundi, humans, and even spiritual figures.