In 2011 Thure E. Cerling of the University of Utah and colleagues, published a study in the Proceedings of the National Academy of Sciences of their work with the carbon isotopes in the enamel of 24 teeth from 22 Paranthropus individuals who lived in East Africa between 1.4 million and 1.9 million years ago.
Thure E. Cerling i kolege su 2011. godine u časopisu Proceedings of the National Academy of Sciences objavili istraživanje vezano za rad s izotopima ugljika u caklini 24 zuba 22 jedinke roda Paranthropus koje su živjele u Istočnoj Africi prije 1,4 i 1,9 milijuna godina.