We report here on the isotopic analysis of the diet of one of the oldest modern humans found in Eurasia, the Tianyuan 1 early modern human dating to approximately 40,000 calendar years ago from Tianyuan Cave (Tianyuandong) in the Zhoukoudian region of China. Carbon and nitrogen isotope analysis of the human and associated faunal remains indicate a diet high in animal protein, and the high nitro...

Fifteen minutes after intraperitoneal injection of sulfur-35 as sodium sulfate to 7-day-old rats the concentration of the isotope was highest in the cartilage at the epiphyseal-diaphyseal junction of long bones but was demonstrable throughout the entire epiphysis. Up to the 24th hour the pattern of deposition did not change as the concentration continued to increase. As centers of secondary oss...