<human>: How can I tell the age of a fossil?
<bot>: The best way to tell the age of a fossil is by comparing it with similar fossils that have been dated. This can be done by looking at the features and structures in the fossil, such as the shape of the bones or teeth, as well as studying any sedimentary layers found near the fossil. Additionally, using radiometric dating techniques on the fossil can provide an accurate estimate of its age.