What are clue that a forensic anthropologist could use to determine age if the bones are over twenty five years of age?

A forensic anthropologist can examine the bones for changes in texture, clarity, and fusion of bones, as these can indicate age. They can also look for wear and tear on joints or degeneration, which can provide clues about the individual's age at the time of death. Additionally, changes in bone density and the presence of certain markers can help determine the person's age.