This study is a stratified random sampling survey among 410 students of Islamic Azad University of Mashhad Branch. And a self-administered questionnaire was also conducted. The face validity and reliability of Cronbach's alpha coefficient was used here. Cronbach's alpha coefficient is 0/811. Extroversion, self-esteem, social relationship, behavior kindly, stable behavior, insight, normal person...

This research investigates the potential of a new, noninvasive method for determining age of weaning among primates using stable carbon and nitrogen isotope ratios in feces. Analysis of stable isotope ratios in body tissues is a well-established method in archeology and ecology for reconstructing diet. This is the first study to investigate weaning in primates using fecal stable isotope ratios....

Observations of hunting and meat eating in our closest living relatives, chimpanzees (Pan troglodytes), suggest that among primates, regular inclusion of meat in the diet is not a characteristic unique to Homo. Wild chimpanzees are known to consume vertebrate meat, but its actual dietary contribution is, depending on the study population, often either unknown or minimal. Constraints on continua...