Estimating age at death for adults involves observing morphological features in the skeletal remains, comparing the information with changes recorded for recent populations of known age. With subadults, the development of teeth, length of long bones, and union of epiphyses are used to estimate age. With adults, age is measured through macroscopic and microscopic methods. Macroscopic methods do not involve destruction of the specimen while microscopic methods are more time intensive and require equipment, some destruction, and specialized knowledge. Despite some disadvantages, microscopic methods give more accurate results.