//Skull //Thorax //Pelvic Gridle //Lower Limbs //Upper Limbs

Project Description

Welcome to J-Skel, the online juvenile skeletal age estimator. This project is aimed at acquainting students of physical anthropology and human osteology with a few of the different methods used to estimate the age-at-death of human subadult skeletal remains.

Due to their complex growth and development, subadult remains are rarely addressed in introductory osteology classes and even infrequently studied in advanced graduate courses as well. As a result, some osteologists and physical anthropologists are relatively unfamiliar with subadult osteology when remains are encountered in the field or lab. However, it is their complex development that allows you to more accurately estimate the age of subadult remains compared to those of an adult. For this project, epiphyseal fusion will be the main aging method as well as the appearance of ossification centers.

Research involving subadult skeletal remains has taken off in the past few decades, but there is still quite a bit of bias. Most of the studies published, and as a result most that are used in this project, are from white European or European American samples. As the research corpus expands, more regional studies are being conducted and tailored to specific geographically and culturally bounded populations.


  • Click on the bone group on the diagram of which bone you wish to assess the age.
  • Compare the bone/element you have to the aging methods provided
  • Input your age range in the "Ages Estimator" box on the right

*Note: all photographs of the skeletal remains on this site were taken by site designer Jack Biggs. These photos are part of the intellectual property of Michigan State Univeristy and the Maya Bioarchaeology Lab.